Climate Insights for Grafton

The climate in Grafton is temperate. The average annual temperature is 12°C and approximately 1427mm of precipitation falls per year. Grafton receives a notable amount of rainfall throughout the year, including during its driest month. Grafton is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -3°C. Snowfall occurs from January to December, with around 80cm accumulating over the season.

Temperatures in Grafton vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -3°C and the daily average is 0°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Grafton is a fairly wet location, receiving approximately 1427mm of precipitation annually, which averages out to around 119mm per month. The wettest month is June, averaging 141mm of rainfall. May and April also tend to see above-average precipitation. The driest month is November, with just 89mm. That's 53mm less than June, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 80cm accumulating over the season. January typically sees the most snow at around 25cm.

Grafton is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 8km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 18km/h in winter, 17km/h in spring, 12km/h in summer, 14km/h in autumn.

It is currently spring in Grafton, which began on March 20, 2026. Grafton is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 27°C, while the coldest stretch bottoms out in January near -3°C. Summer is next, beginning on June 21, 2026 — 83 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.