Climate Insights for Windsor

The climate in Windsor is temperate. The average annual temperature is 11°C and approximately 898mm of precipitation falls per year. Windsor receives a notable amount of rainfall throughout the year, including during its driest month. Windsor 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 February, January, December, when temperatures can drop to -5°C. Snowfall occurs from January to December, with around 65cm accumulating over the season.

Temperatures in Windsor vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 28°C and the mean temperature sits around 24°C. The coldest month is February, when overnight lows fall to -5°C and the daily average is -2°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.

Windsor is a moderately rainy area, receiving approximately 898mm of precipitation annually, which averages out to around 75mm per month. The wettest month is May, averaging 93mm of rainfall. April and July also tend to see above-average precipitation. The driest month is September, with just 59mm. That's 34mm less than May, 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 65cm accumulating over the season. February typically sees the most snow at around 19cm.

Windsor is moderately windy, with an average annual wind speed of 20km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 7km/h 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 22km/h in winter, 21km/h in spring, 17km/h in summer, 20km/h in autumn.

It is currently spring in Windsor, which began on March 20, 2026. Windsor 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 28°C, while the coldest stretch bottoms out in February near -5°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Windsor is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 80mm per month. By contrast, February can be quite cold with temperatures dropping to -5°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Windsor 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.