Grafton has a warm subtropical climate with warm summers and mild winters.
Temperatures peak in January and drop to their lowest in July, while rainfall is highest during spring and early summer months.
Humidity remains moderate throughout the year, especially in spring, creating warm and humid conditions.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | ☔ | 28.6°C | 24.9°C | 21.2°C | 40.7°C | 17.3°C | 72% | 150 | 3.0 | 6.40 |
| February | 🌧️ | 27.8°C | 24.5°C | 21.2°C | 41.2°C | 15.9°C | 74% | 172 | 3.0 | 5.78 |
| March | 🌧️ | 26.2°C | 23.1°C | 20.1°C | 35.9°C | 13.8°C | 76% | 177 | 2.8 | 4.94 |
| April | ☔ | 23.9°C | 20.8°C | 17.8°C | 32.8°C | 9.3°C | 75% | 123 | 2.6 | 4.25 |
| May | ☔ | 21.3°C | 18.2°C | 15.1°C | 29.7°C | 7.0°C | 75% | 114 | 2.5 | 3.43 |
| June | ☔ | 18.9°C | 15.7°C | 12.4°C | 26.0°C | 4.9°C | 75% | 93 | 2.5 | 3.04 |
| July | 🌤️ | 18.5°C | 14.8°C | 11.1°C | 25.5°C | 5.3°C | 73% | 57 | 2.5 | 3.33 |
| August | ☀️ | 19.9°C | 15.7°C | 11.5°C | 30.0°C | 6.1°C | 70% | 53 | 2.5 | 4.26 |
| September | ☀️ | 22.9°C | 18.3°C | 13.8°C | 34.9°C | 6.4°C | 68% | 45 | 2.7 | 5.33 |
| October | ☔ | 25.1°C | 20.6°C | 16.1°C | 37.0°C | 8.5°C | 67% | 82 | 2.9 | 5.94 |
| November | ☔ | 26.5°C | 22.3°C | 18.2°C | 39.9°C | 11.4°C | 69% | 111 | 3.0 | 6.33 |
| December | ☔ | 28.1°C | 24.1°C | 20.0°C | 40.1°C | 14.0°C | 69% | 128 | 3.0 | 6.58 |
Showing average climate conditions across 45 years (1981–2025)
🧥 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.
☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.
Monthly averages · 1981–2025 climate normals · °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.
Monthly rainfall · 1981–2025 seasonal trends · mm/month
Rainfall is concentrated in the spring and early summer months. Humidity stays moderate (around 72%), peaking in spring, which creates warm and humid conditions.
☔ Heavy Rainfall expected — carry rain gear and plan outdoor activities around these months.
Monthly averages · 1981–2025
Across 45 years of records, Grafton's temperature shows a slight warming trend over the past decade. Its hottest day reached 41.1°C in February 2004, and its coldest dropped to 4.9°C in June 1990. 2019 was the warmest year overall and 1984 the coolest.
The warmest year in Grafton's recorded history was 2019 (avg: 21.6°C), while the coldest was 1984 (avg: 19.1°C).
Average annual high/low · Last 30 years · °C
Total annual precipitation · Last 30 years · mm/year
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 24.3°C | 20.8°C | 17.3°C | 36.1°C | 7.5°C | 1527 | 75% | 2.8 m/s |
2024 | 24.6°C | 21.1°C | 17.7°C | 35.8°C | 7.1°C | 1438 | 75% | 2.6 m/s |
2023 | 25.5°C | 21.4°C | 17.2°C | 36.9°C | 8.1°C | 783 | 67% | 2.6 m/s |
2022 | 22.8°C | 19.6°C | 16.4°C | 34.5°C | 7.0°C | 1824 | 77% | 2.8 m/s |
2021 | 23.3°C | 19.8°C | 16.3°C | 32.3°C | 7.8°C | 1512 | 75% | 2.7 m/s |
2020 | 24.1°C | 20.5°C | 17.0°C | 38.1°C | 7.5°C | 1627 | 74% | 2.7 m/s |
2019 🔥 | 25.8°C | 21.6°C | 17.4°C | 38.8°C | 7.2°C | 624 | 65% | 2.7 m/s |
2018 | 24.8°C | 20.8°C | 16.9°C | 38.9°C | 5.5°C | 1018 | 70% | 2.8 m/s |
2017 | 24.4°C | 20.7°C | 16.9°C | 41.1°C | 6.7°C | 1486 | 73% | 2.7 m/s |
2016 | 25.3°C | 21.2°C | 17.1°C | 38.0°C | 7.3°C | 836 | 68% | 2.7 m/s |
Showing 1 to 10 of 45 years
Based on 45 years of data (1981–2025), January is typically the hottest month in Grafton, New South Wales, with average high temperatures around 28.6°C.
July is the coldest month in Grafton, with average low temperatures around 11.1°C.
March receives the most rainfall with approximately 177 mm, while September is the driest with 45 mm.
The highest recorded temperature was 41.1°C in February 2004. This is part of the historical record spanning 1981–2025.
The lowest recorded temperature was 4.9°C in June 1990.
This page covers 45 years of climate data from 1981 to 2025. As new data is added to the database the page automatically reflects the updated coverage.
Grafton receives the most sunlight in December with an average solar radiation of 6.58 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning and agriculture in New South Wales.
All climate data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite and model data. It provides monthly averages for temperature, precipitation, humidity, wind speed, and solar radiation.
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.
