New South Wales has a warm temperate climate with warm summers and mild winters.
New South Wales has an average annual temperature of 17.4°C across all 68 cities, with approximately 886 mm of annual precipitation and average humidity of 69%. Temperatures peak in January and drop to their lowest in July, while rainfall is highest during winter months.
The warmest city is Tweed Heads with average July highs of 19.5°C, while Cooma is the coldest with average January lows of 12.2°C. Humidity remains moderate throughout the year creating warm and humid 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 | ⛅ | 29.7°C | 23.9°C | 18.2°C | 48.5°C | 3.2°C | 61% | 91 | 2.4 | 6.90 |
| February | ⛅ | 28.6°C | 23.3°C | 18.0°C | 47.8°C | 3.5°C | 65% | 101 | 2.3 | 6.10 |
| March | ⛅ | 26.2°C | 21.2°C | 16.2°C | 44.5°C | 0.6°C | 67% | 100 | 2.2 | 5.20 |
| April | ☀️ | 22.6°C | 17.9°C | 13.2°C | 38.8°C | -1.1°C | 70% | 75 | 2.0 | 4.10 |
| May | 🌤️ | 18.8°C | 14.4°C | 10.1°C | 31.7°C | -4.5°C | 74% | 66 | 2.0 | 3.10 |
| June | 🌤️ | 15.5°C | 11.5°C | 7.5°C | 28.0°C | -5.1°C | 79% | 68 | 2.0 | 2.60 |
| July | 🌤️ | 14.9°C | 10.6°C | 6.4°C | 29.2°C | -5.2°C | 77% | 54 | 2.1 | 2.90 |
| August | 🌤️ | 16.4°C | 11.7°C | 6.9°C | 35.9°C | -4.5°C | 73% | 52 | 2.1 | 3.80 |
| September | 🌤️ | 19.8°C | 14.4°C | 9.1°C | 40.4°C | -3.9°C | 68% | 47 | 2.2 | 5.00 |
| October | ☀️ | 22.9°C | 17.3°C | 11.6°C | 44.1°C | -3.0°C | 64% | 67 | 2.2 | 6.00 |
| November | ⛅ | 25.5°C | 19.8°C | 14.2°C | 47.0°C | -0.9°C | 63% | 85 | 2.3 | 6.60 |
| December | ⛅ | 28.0°C | 22.2°C | 16.3°C | 47.6°C | 1.0°C | 61% | 82 | 2.3 | 7.10 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 68 cities in New South Wales
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Conditions are ideal for outdoor activities throughout the day in this Mild Summer.
☔ Moderate Rainfall expected — carry rain gear and plan outdoor activities around these months.
Region-wide monthly averages across 68 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 79% in June · annual avg 69%
Monthly averages · 1981–2025
Across 45 years, New South Wales's temperature has remained relatively stable over the past decade. 2019 was the warmest year overall and 1984 the coolest.
The warmest year on record was 2019 (avg: 18.7°C), while the coldest year was 1984 (avg: 16.1°C).
Averaged across all 68 cities in New South Wales · Last 30 years · °C
Averaged across all 68 cities in New South Wales · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 68 cities in New South Wales for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 23.3°C | 18.3°C | 13.2°C | 45.5°C | -2.9°C | 878 | 68% | 2.2 m/s |
2024 | 23.4°C | 18.4°C | 13.4°C | 45.3°C | -3.1°C | 842 | 69% | 2.1 m/s |
2023 | 23.6°C | 18.3°C | 13.0°C | 44.5°C | -2.7°C | 681 | 66% | 2.1 m/s |
2022 🌧️ | 20.9°C | 16.7°C | 12.4°C | 44.5°C | -3.3°C | 1244 | 76% | 2.2 m/s |
2021 | 21.4°C | 16.7°C | 12.0°C | 43.4°C | -2.9°C | 1049 | 72% | 2.2 m/s |
2020 | 22.3°C | 17.5°C | 12.7°C | 47.7°C | -3.1°C | 1098 | 72% | 2.2 m/s |
2019 🔥 | 24.3°C | 18.7°C | 13.1°C | 48.3°C | -4.5°C | 429 | 61% | 2.2 m/s |
2018 | 23.7°C | 18.3°C | 12.8°C | 47.6°C | -4.0°C | 605 | 63% | 2.2 m/s |
2017 | 23.5°C | 18.2°C | 12.9°C | 47.1°C | -3.4°C | 750 | 66% | 2.2 m/s |
2016 | 23.1°C | 18.0°C | 12.9°C | 45.6°C | -2.7°C | 757 | 67% | 2.2 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.
