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Mont-de-Marsan Weather by Month
Average temperatures, rainfall and humidity for Mont-de-Marsan, France, month by month, built from OpenWeather's historical records. Use it to see what a typical Mont-de-Marsan month looks like before you travel — then check the live Mont-de-Marsan forecast for the days ahead.
Warmest month
July
29°C average high
Coolest month
January
4°C average low
Wettest month
January
104 mm of rain
Driest month
July
22 mm of rain
Average temperature and rainfall in Mont-de-Marsan by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 11°C | 4°C | -8°C / 40°C | 104 mm | 86% | 12 km/h |
| February | 13°C | 5°C | -6°C / 38°C | 76 mm | 82% | 14 km/h |
| March | 16°C | 6°C | -3°C / 46°C | 58 mm | 75% | 14 km/h |
| April | 19°C | 8°C | -2°C / 42°C | 43 mm | 69% | 13 km/h |
| May | 22°C | 12°C | 2°C / 36°C | 45 mm | 69% | 12 km/h |
| June | 26°C | 16°C | 8°C / 43°C | 43 mm | 68% | 11 km/h |
| July | 29°C | 17°C | 10°C / 42°C | 22 mm | 65% | 12 km/h |
| August | 29°C | 17°C | 10°C / 42°C | 31 mm | 66% | 11 km/h |
| September | 25°C | 14°C | 4°C / 39°C | 37 mm | 70% | 11 km/h |
| October | 21°C | 11°C | 0°C / 33°C | 54 mm | 80% | 11 km/h |
| November | 15°C | 7°C | -4°C / 25°C | 99 mm | 84% | 11 km/h |
| December | 12°C | 5°C | -8°C / 21°C | 90 mm | 87% | 12 km/h |
Best time to visit Mont-de-Marsan
The most comfortable time to visit Mont-de-Marsan is generally May to June and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around January, totalling about 703 mm a year.
Travellers who prefer heat should aim for July, when highs average 29°C. January is the month to avoid if rain would spoil your plans — it averages 104 mm, roughly 5× the rainfall of July.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Mont-de-Marsan forecast for what is happening now.