Climate Insights for Williston

The climate in Williston is temperate. The average annual temperature is 18°C and approximately 142mm of precipitation falls per year. März is the wettest month, receiving around 22mm of rainfall. Williston 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: Januar, Februar, Dezember. The coldest months are Juli, August, Juni, when temperatures can drop to 2°C.

Temperatures in Williston vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is Januar, when average highs reach 33°C and the mean temperature sits around 26°C. Juli is the coolest month, with minimum temperatures around 2°C and an average of 9°C. The average daily temperature swing is 16°C, meaning significant differences between daytime and nighttime temperatures. The sharpest temperature change occurs between September and October, with a 5°C shift in average temperatures.

Williston is a quite dry location, receiving approximately 142mm of precipitation annually, which averages out to around 12mm per month. The wettest month is March, averaging 22mm of rainfall. April and January also tend to see above-average precipitation. The driest month is August, with just 4mm. 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.

Williston is moderately windy, with an average annual wind speed of 27km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 29km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 24km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 26km/h in winter, 28km/h in spring, 29km/h in summer, 25km/h in autumn.

It is currently winter in Williston, which began on June 21, 2026. Williston 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 Januar at around 33°C, while the coldest stretch bottoms out in Juli near 2°C. Autumn is next, beginning on March 20, 2026 — 2 days from now.

The best time to visit Williston is during Februar, März, April, Oktober, November and Dezember, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 14mm per month. By contrast, Januar can be uncomfortably hot with highs reaching 33°C, while Juli is the coldest period with lows dropping to 2°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Williston 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.