Climate Insights for Castelnau-Montratier

The climate in Castelnau-Montratier is temperate. The average annual temperature is 14°C and approximately 856mm of precipitation falls per year. Castelnau-Montratier receives a notable amount of rainfall throughout the year, including during its driest month. Castelnau-Montratier 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 Castelnau-Montratier 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 23°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 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.

Castelnau-Montratier is a moderately rainy area, receiving approximately 856mm of precipitation annually, which averages out to around 71mm per month. The wettest month is November, averaging 89mm of rainfall. June and May also tend to see above-average precipitation. The driest month is July, with just 45mm. That's 44mm less than November, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Castelnau-Montratier is relatively calm, with an average annual wind speed of 11km/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 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.

It is currently autumn in Castelnau-Montratier, which began on September 23, 2026. Castelnau-Montratier 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. Winter is next, beginning on December 21, 2026 (86 days from now).

The best time to visit Castelnau-Montratier 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 67mm 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 Castelnau-Montratier 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.