South Australia has a warm subtropical climate with warm summers and mild winters.
South Australia has an average annual temperature of 19.0°C across all 26 cities, with approximately 365 mm of annual precipitation and average humidity of 62%. Temperatures peak in January and drop to their lowest in July, while rainfall is highest during summer months.
The warmest city is Kingoonya with average July highs of 23.7°C, while Penola is the coldest with average January lows of 8.7°C. Humidity remains moderate throughout the year creating warm and dry conditions. These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
| Month | 🌤️ | High | Low | Avg | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|
| January | 😎 | 40.5°C | 12.1°C | 26.3°C | 49% | 18 | 4.1 | 7.80 |
| February | 😎 | 39.2°C | 12.1°C | 25.6°C | 50% | 16 | 4.0 | 7.00 |
| March | 😎 | 36.1°C | 10.5°C | 23.3°C | 55% | 20 | 3.6 | 5.70 |
| April | ☀️ | 30.8°C | 8.3°C | 19.5°C | 60% | 25 | 3.2 | 4.20 |
| May | ☀️ | 25.0°C | 5.7°C | 15.3°C | 69% | 36 | 3.1 | 3.00 |
| June | 🌤️ | 20.4°C | 3.6°C | 12.0°C | 75% | 48 | 3.3 | 2.40 |
| July | 🌤️ | 19.7°C | 2.9°C | 11.3°C | 75% | 48 | 3.4 | 2.70 |
| August | 🌤️ | 22.6°C | 3.5°C | 13.0°C | 72% | 44 | 3.6 | 3.60 |
| September | ☀️ | 27.3°C | 4.7°C | 16.0°C | 66% | 37 | 3.6 | 4.90 |
| October | ☀️ | 31.9°C | 6.2°C | 19.1°C | 60% | 28 | 3.8 | 6.20 |
| November | 😎 | 35.9°C | 8.0°C | 22.0°C | 55% | 23 | 3.9 | 7.10 |
| December | 😎 | 38.3°C | 10.1°C | 24.2°C | 51% | 23 | 4.1 | 7.70 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 26 cities in South Australia
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Limit midday outdoor exposure and stay hydrated — this is an intense Hot Summer.
☔ Rainfall is spread across the year with no sharply defined wet season.
Region-wide monthly averages across 26 cities · 1981–2025 · °C
Temperatures rise steadily from spring, peak in January, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 75% in July · annual avg 62%
Monthly averages · 1981–2025
Across 45 years, South Australia's temperature has remained relatively stable over the past decade. 2019 was the warmest year overall and 1992 the coolest.
The warmest year on record was 2019 (avg: 20.4°C), while the coldest year was 1992 (avg: 17.8°C).
Averaged across all 26 cities in South Australia · Last 30 years · °C
Averaged across all 26 cities in South Australia · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 26 cities in South Australia for each year.
| Year | Min Temp | Avg Temp | Max Temp | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|
2025 | 8.2°C | 20.0°C | 31.7°C | 239 | 58% | 3.7 m/s |
2024 | 8.0°C | 19.7°C | 31.3°C | 254 | 60% | 3.5 m/s |
2023 | 8.0°C | 19.8°C | 31.6°C | 257 | 61% | 3.6 m/s |
2022 | 7.8°C | 18.4°C | 29.0°C | 432 | 65% | 3.6 m/s |
2021 | 7.4°C | 19.1°C | 30.7°C | 291 | 61% | 3.7 m/s |
2020 | 7.2°C | 18.6°C | 30.0°C | 391 | 62% | 3.7 m/s |
2019 🔥 | 7.6°C | 20.4°C | 33.2°C | 129 | 56% | 3.7 m/s |
2018 | 7.9°C | 19.9°C | 31.8°C | 135 | 56% | 3.7 m/s |
2017 | 7.7°C | 19.8°C | 31.9°C | 149 | 58% | 3.6 m/s |
2016 | 7.6°C | 19.1°C | 30.6°C | 318 | 62% | 3.7 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
