Climate Insights for Grafton

The climate in Grafton is hot. The average annual temperature is 27°C and approximately 340mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. Grafton is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, August, September. The coldest months are November, December, February, when temperatures can drop to 24°C.

Grafton has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is December, when average highs reach 30°C and the mean temperature sits around 27°C. November is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Grafton is a quite dry location, receiving approximately 340mm of precipitation annually, which averages out to around 28mm per month. The wettest month is February, averaging 33mm of rainfall. July and August also tend to see above-average precipitation. The driest month is April, with just 17mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Grafton is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 5km/h in winter, 3km/h in spring, 7km/h in summer, 9km/h in autumn.

It is currently winter in Grafton, which began on June 21, 2026. Grafton is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around 30°C, while the coldest stretch bottoms out in November near 24°C. Spring is next, beginning on September 23, 2026 — 18 days from now.

The table below shows monthly climate averages for Grafton based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.