Climate Insights for Castanet-Tolosan

The climate in Castanet-Tolosan is temperate. The average annual temperature is 15°C and approximately 824mm of precipitation falls per year. Castanet-Tolosan receives a notable amount of rainfall throughout the year, including during its driest month. Castanet-Tolosan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to 3°C.

Temperatures in Castanet-Tolosan vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 24°C. January is the coolest month, with minimum temperatures around 3°C and an average of 6°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.

Castanet-Tolosan is a moderately rainy area, receiving approximately 824mm of precipitation annually, which averages out to around 69mm per month. The wettest month is May, averaging 91mm of rainfall. November and December also tend to see above-average precipitation. The driest month is August, with just 51mm. That's 40mm 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.

Castanet-Tolosan is mildly breezy, with an average annual wind speed of 12km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months.

It is currently summer in Castanet-Tolosan, which began on June 21, 2026. Castanet-Tolosan 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 August at around 30°C, while the coldest stretch bottoms out in January near 3°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Castanet-Tolosan is during May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 64mm per month. By contrast, January can be quite cold with temperatures dropping to 3°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Castanet-Tolosan 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.