Western Australia has a warm subtropical climate with warm summers and mild winters.
Western Australia has an average annual temperature of 22.1°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 34.7°C, while Manjimup is the coldest with average January lows of 9.3°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 | 🥵 | 40.4°C | 16.2°C | 28.3°C | 52% | 46 | 4.4 | 7.80 |
| February | 😎 | 39.3°C | 16.4°C | 27.9°C | 55% | 47 | 4.2 | 7.10 |
| March | 😎 | 37.5°C | 14.9°C | 26.2°C | 56% | 39 | 3.9 | 6.00 |
| April | 😎 | 33.6°C | 12.4°C | 23.0°C | 58% | 27 | 3.5 | 4.80 |
| May | ☀️ | 29.0°C | 9.4°C | 19.2°C | 61% | 47 | 3.5 | 3.70 |
| June | ☀️ | 25.0°C | 7.1°C | 16.1°C | 65% | 60 | 3.6 | 3.20 |
| July | ☀️ | 24.0°C | 6.0°C | 15.0°C | 66% | 61 | 3.6 | 3.50 |
| August | ☀️ | 26.0°C | 6.6°C | 16.3°C | 64% | 47 | 3.6 | 4.40 |
| September | ☀️ | 29.6°C | 8.2°C | 18.9°C | 61% | 33 | 3.7 | 5.60 |
| October | 😎 | 33.8°C | 10.2°C | 22.0°C | 56% | 21 | 4.0 | 6.80 |
| November | 😎 | 37.0°C | 12.5°C | 24.8°C | 53% | 22 | 4.2 | 7.60 |
| December | 😎 | 39.4°C | 14.6°C | 27.0°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.
🌤️ 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 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
Monthly averages · 1981–2025
💧 Humidity peaks at 66% in July · annual avg 58%
The warmest year on record was 2024 (avg: 23.4°C), while the coldest year was 1993 (avg: 21.3°C).
Averaged across all 43 cities in Western Australia · Last 10 years · °C
Averaged across all 43 cities in Western Australia · Last 10 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 43 cities in Western Australia for each year.
| Year | Min Temp | Avg Temp | Max Temp | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|
2025 | 12.0°C | 22.9°C | 33.8°C | 406 | 56% | 3.9 m/s |
2024 | 12.6°C | 23.4°C | 34.1°C | 392 | 57% | 3.9 m/s |
2023 | 11.8°C | 22.7°C | 33.6°C | 325 | 56% | 3.9 m/s |
2022 | 11.8°C | 22.3°C | 32.8°C | 416 | 58% | 3.9 m/s |
2021 | 11.4°C | 22.2°C | 32.9°C | 431 | 57% | 4.0 m/s |
2020 | 11.6°C | 22.9°C | 34.1°C | 415 | 56% | 3.9 m/s |
2019 🔥 | 11.4°C | 23.0°C | 34.5°C | 301 | 54% | 3.8 m/s |
2018 | 11.4°C | 22.3°C | 33.1°C | 418 | 58% | 3.9 m/s |
2017 | 11.2°C | 22.0°C | 32.8°C | 509 | 59% | 3.8 m/s |
2016 | 10.9°C | 21.8°C | 32.6°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.
