Climate Insights for Malmesbury

The climate in Malmesbury is temperate. The average annual temperature is 18°C and approximately 507mm of precipitation falls per year. June is the wettest month, receiving around 114mm of rainfall. Malmesbury 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: January, February, December. The coldest months are July, August, June, when temperatures can drop to 6°C.

Temperatures in Malmesbury vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 31°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 6°C and an average of 11°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 4°C shift in average temperatures.

Malmesbury is a relatively dry area, receiving approximately 507mm of precipitation annually, which averages out to around 42mm per month. The wettest month is June, averaging 114mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 8mm. That's 107mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Malmesbury is mildly breezy, with an average annual wind speed of 18km/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 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 15km/h in winter, 19km/h in spring, 21km/h in summer, 16km/h in autumn.

It is currently winter in Malmesbury, which began on June 21, 2026. Malmesbury 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 January at around 31°C, while the coldest stretch bottoms out in July near 6°C. Autumn is next, beginning on March 20, 2026 — 3 days from now.

The best time to visit Malmesbury is during January, February, March, April, May, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 22mm per month. By contrast, July can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Malmesbury 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.