Western Australia has a warm subtropical climate with warm summers and mild winters.
Western Australia has an average annual temperature of 21.2°C across all 43 cities, with approximately 478 mm of annual precipitation and average humidity of 58%. Temperatures peak in January and drop to their lowest in July, while rainfall is highest during summer months.
The warmest city is Wyndham with average July highs of 31.5°C, while Mount Barker is the coldest with average January lows of 13.5°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 | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | 😎 | 33.3°C | 26.8°C | 20.3°C | 49.5°C | 5.9°C | 52% | 46 | 4.4 | 7.80 |
| February | 😎 | 32.8°C | 26.6°C | 20.5°C | 49.8°C | 5.6°C | 55% | 47 | 4.2 | 7.10 |
| March | 😎 | 31.0°C | 25.1°C | 19.3°C | 48.3°C | 4.8°C | 56% | 39 | 3.9 | 6.00 |
| April | 😎 | 27.9°C | 22.4°C | 16.9°C | 44.1°C | 2.8°C | 58% | 27 | 3.5 | 4.80 |
| May | ☀️ | 24.1°C | 18.9°C | 13.7°C | 40.6°C | 1.6°C | 61% | 47 | 3.5 | 3.70 |
| June | ☀️ | 20.9°C | 16.1°C | 11.3°C | 37.3°C | -3.0°C | 65% | 60 | 3.6 | 3.20 |
| July | ☀️ | 20.0°C | 15.0°C | 10.1°C | 37.1°C | -1.8°C | 66% | 61 | 3.6 | 3.50 |
| August | ☀️ | 21.3°C | 15.9°C | 10.6°C | 39.8°C | -0.8°C | 64% | 47 | 3.6 | 4.40 |
| September | ☀️ | 23.8°C | 18.0°C | 12.2°C | 42.7°C | -0.7°C | 61% | 33 | 3.7 | 5.60 |
| October | ☀️ | 27.0°C | 20.7°C | 14.4°C | 47.2°C | -0.3°C | 56% | 21 | 4.0 | 6.80 |
| November | 😎 | 29.6°C | 23.2°C | 16.7°C | 47.3°C | 2.0°C | 53% | 22 | 4.2 | 7.60 |
| December | 😎 | 32.0°C | 25.4°C | 18.8°C | 49.2°C | 5.2°C | 51% | 27 | 4.4 | 8.10 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 43 cities in Western Australia
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Early mornings and evenings are most comfortable during this Hot Summer season.
☔ Rainfall is spread across the year with no sharply defined wet season.
Region-wide monthly averages across 43 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 66% in July · annual avg 58%
Monthly averages · 1981–2025
Across 45 years, Western Australia's temperature has remained relatively stable over the past decade. 2024 was the warmest year overall and 1993 the coolest.
The warmest year on record was 2024 (avg: 22.4°C), while the coldest year was 1993 (avg: 20.5°C).
Averaged across all 43 cities in Western Australia · Last 30 years · °C
Averaged across all 43 cities in Western Australia · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 43 cities in Western Australia for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 27.8°C | 22.0°C | 16.2°C | 47.9°C | 0.2°C | 406 | 56% | 3.9 m/s |
2024 | 28.2°C | 22.4°C | 16.6°C | 49.5°C | 0.2°C | 392 | 57% | 3.9 m/s |
2023 | 27.9°C | 22.0°C | 16.0°C | 48.9°C | -0.2°C | 325 | 56% | 3.9 m/s |
2022 | 27.0°C | 21.3°C | 15.6°C | 49.0°C | 0.6°C | 416 | 58% | 3.9 m/s |
2021 | 26.9°C | 21.3°C | 15.6°C | 48.5°C | 0.1°C | 431 | 57% | 4.0 m/s |
2020 | 27.5°C | 21.7°C | 15.9°C | 47.0°C | 1.2°C | 415 | 56% | 3.9 m/s |
2019 🔥 | 28.3°C | 22.1°C | 15.8°C | 48.3°C | 0.0°C | 301 | 54% | 3.8 m/s |
2018 | 27.1°C | 21.3°C | 15.5°C | 48.7°C | -0.5°C | 418 | 58% | 3.9 m/s |
2017 | 26.9°C | 21.2°C | 15.4°C | 47.8°C | -0.6°C | 509 | 59% | 3.8 m/s |
2016 | 26.5°C | 20.9°C | 15.2°C | 47.8°C | -0.7°C | 484 | 60% | 3.9 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.
