From hot summers to mild winters, this guide breaks down Adelaide’s weather and climate so you can plan the perfect trip.

Adelaide is the driest of Australia’s capital cities, boasting a Mediterranean climate with hot, dry summers, mild, wetter winters and comfortable shoulder seasons, meaning it’s a delight to visit any time. Each of Adelaide’s distinct seasons brings its own unique charms – from beach days in summer to cosy gallery visits in winter, and spring and autumn afternoons perfect for hiking, wine tours, and exploring the surrounding countryside.

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If you’re curious about the best time to visit Adelaide for ideal weather —or simply want to know what kind of weather to expect by month—you’re in the right place. In this guide, we’ll break down Adelaide’s weather by season and by month, including average temperatures, rainfall, and humidity. You’ll find everything you need to plan your trip with confidence before you fly to Adelaide, including packing tips and activity ideas to help you make the most of your time in South Australia’s vibrant capital.

 

Adelaide’s weather and climate

Pennington Gardens in Adelaide, South Australia

Credit: myphotobank.com.au from stock.adobe.com

Adelaide has a Mediterranean climate (Csa under the Köppen climate classification), with hot, dry summers and mild, wetter winters, and sunny autumns and springs. The city typically experiences low humidity, long stretches of sunshine, and distinct seasonal change, making it one of Australia’s most weather-friendly capital cities.

While summer in Adelaide is known for clear skies and high temperatures – sometimes exceeding 40°C during heatwaves – winter brings cooler days and most of the city’s annual rainfall between June and August, which averages 163mm in the period. Spring and autumn offer a generally comfortable balance, with sunny days, cooler evenings, and lower rainfall, ideal for outdoor adventures and exploring nearby wine regions.

Because Adelaide’s climate shifts more noticeably by season than by month, timing your trip with the weather in mind can make a real difference. In the sections below, we’ll break down Adelaide’s weather by season and month, including average temperatures, rainfall, and humidity, plus tips on the best time to visit and what to pack.

 

Adelaide weather by season

Summer in Adelaide (December to February)

Aerial View Of Turquoise Ocean Water And White Sand At Glenelg Beach In Adelaide, South Australia.

Credit: myphotobank.com.au from stock.adobe.com

Summer in Adelaide is warm, dry, and perfect for enjoying the city's beaches, parklands, and long sunny days. Daytime highs average around 28–30°C, with average lows around 15–17°C. Heatwaves can push temperatures above 40°C, particularly in late January and February, but Adelaide’s dry air makes it feel less humid and muggy than other cities. 

Humidity stays relatively low during this time of year, with morning humidity average averaging around 51–52%, dropping to 36-38% by the afternoon. Summer in Adeliade is typically the driest and sunniest time, with totals for the season averaging 44–70mm. If you’re chasing sunshine and clear skies, February often brings some of the clearest skies of the year.

With minimal rain and plenty of sunshine, summer is the perfect time for coastal escapes and Adelaide’s buzzing outdoor lifestyle. Swim at Glenelg Beach, enjoy alfresco dining in the city, or hike the trails at Morialta Conservation Park.  IIt's also a great time to plan a day trip from Adelaide , like a wine tasting tour to Barossa or surfing at Fleurieu Peninsula. Just keep in mind that summer is peak holiday season, so booking accommodation and activities early.

What to pack:

  • Swimwear and beach gear: Adelaide’s coastline shines in summer, so bring swimmers, a quick-dry towel, and beach shoes for seaside days.
  • Reusable water bottle: With hot, dry afternoons, a refillable bottle helps you stay hydrated while exploring outdoors.
  • Light evening layers: Pack a light jacket or wrap for cooler nights, especially if you're dining outside or walking along the coast. 
     

Autumn in Adelaide (March to May)

Autumn Vineyard in Adelaide

Credit: AmazingAerialAgency from stock.adobe.com

Autumn in Adelaide is mild and comfortable with sunny afternoons, cooler mornings, and the first signs of an increase in rainfall. Daytime highs average 20–25°C, while overnight lows drop to around 10–13°C. Early in the season, some days can still reach beyond 26°C, especially in March.

Humidity begins to rise during autumn, with morning humidity averaging close to 70%, falling to between 40% and 55% by afternoon. Rainfall also becomes more frequent throughout autumn, with the season receiving an average of 81-122mm overall. May is the wettest month of autumn, so it’s wise to have a flexible itinerary and plan for the occasional indoor escape.

Autumn is one of the best times to explore Adelaide’s surrounding wine regions, as the vineyards of Barossa and McLaren Vale turn golden and harvest is in full swing. The cooler temperatures also make it perfect for a bike ride along the River Torrens Linear Trail as the leaves begin to change. Whether you're after crisp countryside air or city strolls, autumn offers a balance of calm, colour, and adventure.

What to pack:

  • Layered clothing: Pack a mix of t-shirts, long sleeves, and a light jacket to adapt to changing temperatures throughout the day.
  • Rain protection: An umbrella or lightweight raincoat is handy, especially if you're visiting in May, when there’s a greater chance of rainfall.
  • Compact day bag: A small, lightweight backpack or crossbody bag is perfect for carrying essentials while hiking, wine tasting, or spending the day outdoors.

 

Winter in Adelaide (June to August)

The facade of Mortlock Library located at the front of the South Australian Museum in Adelaide, South Australia

Credit: Kwest from stock.adobe.com

Winter in Adelaide brings the city’s coolest and wettest conditions of the year, with average daytime temperatures ranging from 14–16°C and lows around 7–8°C. Rainfall peaks during winter, with totals between 200 and 216mm, making it the wettest time of year. June is the rainiest month of the year in Adelaide, so be sure to check the forecast before your trip and plan your packing list and itinerary accordingly.

Humidity levels tend to be at their highest during winter, particularly in the mornings at around 78%, dropping to 54–61% by afternoon. 

Despite the cooler and wetter weather, winter in Adelaide can still be a beautiful time to visit if you’re prepared for the occasional rainy day. The city’s many galleries, markets, and museums provide plenty of indoor options to explore, while a cool, misty morning in Adelaide Hills offers a picturesque setting. If you’re lucky with clear, dry weather in Adelaide during the winter, a visit to St Peters Billabong provides a beautiful nature escape.

What to pack:

  • Warm layers: Bring coats, jumpers, scarves, and long pants to stay warm, especially during early mornings and evenings.
  • Rain protection: A waterproof jacket or compact umbrella will be useful, particularly in June when rainfall is highest.
  • Indoor activity gear: Think books for a cosy café afternoon, or smart-casual outfits for dining out or visiting a gallery.

 

Spring in Adelaide (September to November)

Wisteria Lane in the Adelaide Botanic Gardens, South Australia.

Credit: Beth Baisch from stock.adobe.com

Spring in Adelaide brings a welcome shift in the weather, with warmer temperatures, lower humidity, and longer sunny days. Average daytime highs range from 20°C to 24°C, with cooler lows around 10°C. By late November, some days may reach 25°C, though evenings can still feel brisk.

One of the best parts of spring is the drop in humidity. Morning humidity typically ranges from 53% to 62%, dropping to 40%–50% in the afternoon.

Rainfall during spring averages between 90 and 130mm across the season, with September typically being the wettest spring month. Despite this, spring offers increasing sunshine as November approaches.

Spring is ideal for outdoor activities, sightseeing and making the most of Adelaide’s attractions before the summer crowds arrive. Whether you're interested in exploring Adelaide Central Market, wandering through Adelaide Botanic Garden, or checking off the most popular Adelaide attractions without the crowds, spring’s mild weather is perfect for all of it.

What to pack: 

  • Light layers: Spring mornings can be brisk, but the afternoons warm up nicely. Pack a mix of t-shirts, long sleeves, and a light jacket or jumper for layering.
  • Comfortable walking shoes: With great weather for sightseeing and outdoor adventures, you’ll want reliable shoes for walking.
  • Rain protection: A compact umbrella or light rain jacket will come in handy, especially if you’re visiting in September.
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Adelaide weather by month

Adelaide in January

Hot and dry with lots of sunshine

Ideal for beach days, outdoor dining, and festivals.

January in Adelaide is hot, dry, and sunny, ideal for beach days, outdoor dining, and summer festivals. Average temperatures range from lows of 17°C to a maximum of 29°C during the day. Heatwaves occasionally push temperatures into the high 30s and beyond 40°C. 

Adelaide’s dry heat and lower humidity means it rarely feels muggy or uncomfortably hot, with morning humidity around 52% dropping to 36% by afternoon. Evenings tend to be cooler, offering relief from daytime heat. 

Rainfall is minimal during January, averaging 18.3mm across about 4 days in the month. 

 

Adelaide January weather overview

Avg min temp:
17°C
Avg max temp:
29°C
Avg humidity:
53% morning / 42% afternoon
Avg rainfall: 
18.3mm
Avg days of rain:
4.7

 

Adelaide in February

Warm with minimal rainfall

Perfect for a day at the beach, winery visits and scenic walking trails.

February in Adelaide continues the city’s classic dry summer pattern, with warm days, clear skies, and minimal rainfall. Average temperatures range from 17°C in the early mornings to highs around 29°C in the afternoon, though heatwaves can still push temperatures well into the 30s and beyond. Humidity is low, averaging around 53% in the morning and dropping to 42% by afternoon, helping to keep the heat manageable.

Rain is rare, with only a couple of days of light showers expected throughout the month. With sunshine dominating Adelaide’s February forecast, it’s a great time for outdoor excursions and beach days.

 

Adelaide February weather overview

Avg min temp:
17°C
Avg max temp:
29°C
Avg humidity:
53% morning / 42% afternoon
Avg rainfall: 
18.5mm
Avg days of rain:
4

 

Adelaide in March

Warm, dry, and mostly sunny

Great for outdoor adventures and soaking in Adelaide’s summer charm.

March marks the start of autumn in Adelaide, bringing slightly cooler temperatures while still holding onto the warmth of summer. Average daily temperatures range from 15°C in the morning to 26°C in the afternoon, making it ideal for spending time outdoors without the intensity of peak summer heat. Humidity levels are comfortable, averaging around 58% in the morning and dropping to 45% by afternoon. Rainfall remains low, with about 21mm expected over approximately 5 to 6 days during the month. With mild days and golden evenings, March is an excellent time to explore the nearby wine regions and enjoy scenic walking trails.

 

Adelaide March weather overview

Avg min temp:
15°C
Avg max temp:
26°C
Avg humidity:
58% morning / 45% afternoon
Avg rainfall: 
20.4mm
Avg days of rain:
5.4

 

Adelaide in April

Cool mornings and mild afternoons

Lovely for exploring changing autumn colours and cosy cafes.

April brings a noticeable shift in Adelaide’s weather as autumn settles in with cooler mornings, mild afternoons, and an increase in rainfall. Average daily temperatures range from 12°C in the morning to 23°C in the afternoon, and while the weather daytime temperature is pleasant, you’ll want to bring a light jacket for early starts and evenings.

Humidity continues to rise modestly, averaging around 58% in the morning and dropping to 49% by afternoon. Rainfall increases compared to March, averaging 31.1mm over about seven rainy days. While the afternoons remain pleasant, mornings and evenings can feel brisk, making this a beautiful month to enjoy autumn foliage, visit cosy cafés, and explore Adelaide’s parks before winter arrives.

 

Adelaide April weather overview

Avg min temp:
12°C
Avg max temp:
23°C
Avg humidity:
58% morning / 49% afternoon
Avg rainfall: 
31.1mm
Avg days of rain:
7.4

 

Adelaide in May

Crisp and cool with more rainy days

Perfect for scenic drives and cultural activities

May marks the transition into the cooler half of the year, with Adelaide experiencing crisp mornings, mild afternoons, and a noticeable uptick in rainfall. Average daily temperatures typically range from lows of 10°C to around 19°C in the afternoon. Days in May in are shorter, and although there’s regular sunshine,  the air carries a cool autumn edge. Morning humidity increases this month, with early mornings reaching up to 70%, easing to about 58% by the afternoon. Rain becomes more frequent, with May averaging roughly 47mm of rainfall over about 12 days.  The weather in May in Adelaide is perfect for scenic drives through the Adelaide Hills, stopping at a local café to warm up, or exploring a museum during a shower.

 

Adelaide May weather overview

Avg min temp:
10°C
Avg max temp:
19°C
Avg humidity:
70% morning / 58% afternoon
Avg rainfall: 
46.8mm
Avg days of rain:
11.9

 

Adelaide in June

Cold, damp, and humid

The start of winter and Adelaide’s wettest month

June is the start of winter in Adelaide and the city’s wettest month of the year. Expect crisp mornings, cool afternoons, and frequent showers. Temperatures are cool, with average daytime temperatures of 16°C and overnight lows around 8°C - so make sure to pack warm layers for brisk mornings and evenings. Humidity peaks in winter, with morning humidity reaching around 78%, easing to 64% by afternoon.

Rain is frequent in Adelaide in June, with an average of 60mm over 14 days expected throughout the month, so it’s wise to plan a few indoor experiences like museums, galleries, and cosy café visits. On clearer winter days, the cooler air and quieter beaches and parks make for peaceful nature walks.

 

Adelaide June weather overview

Avg min temp:
8°C
Avg max temp:
16°C
Avg humidity:
78% morning / 64% afternoon
Avg rainfall: 
59.7mm
Avg days of rain:
13.7

 

Adelaide in July

Coldest month with frequent rain

Perfect for culture days, hot drinks, and food tours

July is the peak of Adelaide’s winter and the city’s coldest month of the year. Average temperatures range from 7°C in the early morning to 15°C in the afternoon, so a warm coat and layered clothing are essential. Rain is common and frequent in July, falling on almost 15 days of the month. Humidity remains high, particularly in the mornings, averaging 78%. It’s a great time to explore the city’s vibrant indoor arts and culture scene, or enjoying a long lunch. Clear days can be cool but beautiful, so bring layers and make the most of the peaceful, off-peak season.

 

Adelaide July weather overview

Avg min temp:
7°C
Avg max temp:
15°C
Avg humidity:
78% morning / 64% afternoon
Avg rainfall: 
52.1mm
Avg days of rain:
14.7

 

Adelaide in August

Cool and wet, with increasing sunshine

Ideal for wine tours, and soaking in Adelaide’s food  and culture scene.

August signals the final stretch of winter in Adelaide, with cool temperatures, damp mornings, and a slow return of sunnier days. Average daily temperatures sit between 7°C and 16°C, and while the chill lingers, the days are still pleasant enough to explore. Humidity remains elevated in the mornings, often averaging around 71%—but drops to the high-50s by the afternoon. Rainfall is still common and could be a significant factor to consider when planning your itinerary, with an average of more than 14 days of showers expected throughout the month. Because of the cool and wet conditions, it’s a great time to explore Adelaide’s restaurant scene, coffee culture, local museums, and indoor events. Clearer days are also perfect for booking in a wine tasting tour.

 

Adelaide August weather overview

Avg min temp:
7°C
Avg max temp:
16°C
Avg humidity:
71% morning / 59% afternoon
Avg rainfall: 
51.3mm
Avg days of rain:
14.8

 

Adelaide in September

Mild with sunshine increasing

Perfect timing to see the Botanic Gardens bloom, take a wine tour, or go for a hike

Spring begins to bloom in September, bringing milder weather and a gradual rise in daily temperatures. Average lows are around 9°C, with daytime highs near 19°C, comfortable for exploring, though you may still want a light jacket for mornings and evenings. Humidity is moderate at 64% in the morning and 56% in the afternoon. Rainfall eases slightly compared to winter, with an average of 47.4mm across 12 days, usually as light showers. September is a beautiful time for peaceful walks through the Adelaide Botanic Garden or along the River Torrens as the city gets its first bursts of colour for spring.

 

Adelaide September weather overview

Avg min temp:
9°C
Avg max temp:
19°C
Avg humidity:
64% morning / 56% afternoon
Avg rainfall: 
47.4mm
Avg days of rain:
12.4

 

Adelaide in October

Warm, dry, and pleasant

A top month for vineyards, jacaranda trails, and outdoor dining

October in Adelaide sees a return to mild spring weather, with warmer afternoons, longer days and a noticeable drop in rainfall. Average daily temperatures range from 11°C in the morning to 22°C in the afternoon. Humidity remains moderate, averaging 56% in the morning and dropping to a pleasant 49% by afternoon, and rainfall is lower, with only about 9 days of showers expected during the month. October is one of the best and most comfortable weather months to visit Adelaide thanks to its warm temperatures, low humidity, and small chance of rain. October is ideal for vineyard tours, walks along jacaranda-lined streets, and alfresco dining before the summer heat arrives. 

 

Adelaide October weather overview

Avg min temp:
11°C
Avg max temp:
22°C
Avg humidity:
56% morning / 49% afternoon
Avg rainfall: 
33.6mm
Avg days of rain:
8.9

 

Adelaide in November

Warm and dry with little chance of rain

Perfect for beach trips, picnics, and scenic weekend drives

November in Adelaide is warm, sunny, and mostly dry, bursting with pe-summer energy. Average temperatures range from 14°C in the morning to 25°C in the afternoon, and most days feel sunny and pleasant – perfect for beach outings, hiking, or picnicking in city parks. Humidity stays low, averaging 54% in the morning and dropping to 45% by afternoon, and rainfall is minimal, with about seven days of light showers expected. November is also jacaranda season, colouring the city in a vibrant violet— a beautiful backdrop for city strolls, spring markets, outdoor dining, and scenic drives through the Adelaide Hills or down to the coast.

 

Adelaide November weather overview

Avg min temp:
14°C
Avg max temp:
25°C
Avg humidity:
54% morning / 45% afternoon
Avg rainfall: 
24.4mm
Avg days of rain:
7.4

 

Adelaide in December

Hot, dry and sunny

Great for beach days, coastal escapes and being outdoors under clear skies

December kicks off summer in Adelaide with hot, dry days and long golden evenings that are perfect for outdoor fun. Average temperatures range from 15°C in the morning to 27°C in the afternoon, but it can exceed 40°C during a heatwave. Despite the heat, Adelaide’s dry climate keeps the air feeling comfortable. Humidity levels remain low, averaging 53% in the morning and dropping to 45% by afternoon, and rainfall is low, with just over six days of light showers expected. December’s warm and dry weather is perfect for beach days at Glenelg, coastal escapes, and enjoying festive outdoor events. Keep in mind that holiday crowds grow and prices rise as Christmas approaches, so booking ahead is recommended. 

 

Adelaide December weather overview

Avg min temp:
15°C
Avg max temp:
27°C
Avg humidity:
53% morning / 45% afternoon
Avg rainfall: 
24.6mm
Avg days of rain:
6.7

 

*Average weather figures from bom.gov.au for the period 1991-2020

 

Best time to visit Adelaide for weather

Palm house at botanic garden in Adelaide, Australia

Credit: dudlajzov from stock.adobe.com

Adelaide has great weather year-round, but the best times to visit for mild temperatures, clear skies and low humidity are spring (September to November) and autumn (March to May).

In spring, you’ll enjoy blooming flowers and colourful landscapes, including jacaranda season, and the sunny, warm and comfortable conditions are ideal for sightseeing and exploring the outdoors without the summer crowds. The tail-end of spring also offers days warm enough to enjoy Adelaide’s beaches and coast.

Autumn offers crisp, comfortable days, low chances of rain and the changing landscape to golden hues make for picturesque days spent at the vineyards outside of the city. Autumn is also harvest season in the Barossa, McLaren Vale and Adelaide Hills wine regions. Autumn’s cooler days and longer evenings are also perfect for scenic drives and nature hikes. 

Besides the warm temperatures and lower rainfall, both spring and autumn have fewer visitors than summer, making them the best times to visit for travellers who want good weather and a relaxed atmosphere.  

If you’re heading to Adelaide for prime beach season, summer (December to February) is the clear winner, with hot, dry days that are ideal for days at Glenelg and trips along the coast, or alfresco fine dining. January and February are particularly hot, and be prepared for the chance of heatwave temperatures, when highs can exceed 40°C

No matter when you visit, Adelaide’s mix of coast, culture, and countryside means there’s always something to enjoy—just pack accordingly and plan ahead for any seasonal events or weather changes.

Adelaide weather and climate FAQ

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