Réserve naturelle régionale de l'étang du pont de fer
- Annual mean
- 12.4 °C
- Warmest month
- August
- Wettest month
- December
Monthly averages for temperature, humidity, and precipitation from 1991 to 2020
Annual atmospheric cycles at Réserve naturelle régionale du marais de Brière reveal month-by-month changes in temperature, precipitation, wind speed, and daylight hours. Derived from NASA POWER data at a representative coordinate, these long-term climate normals offer a factual look at environmental conditions. Data covers the 1991 to 2020 climatology period, providing a baseline for understanding regional climate rhythm rather than daily weather or current forecasts.

Long-term monthly averages tracking temperature ranges alongside daily precipitation rates through all twelve months
Track average temperature, daily precipitation, humidity, wind, and calculated daylight across the calendar year
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | 6.6 °C-2.6° to 13.1° | 2.5 mm/day | 91.2% | 6 m/s | 8.7 hours |
| February | 6.6 °C-1.8° to 13.4° | 2.2 mm/day | 88.5% | 5.7 m/s | 10 hours |
| March | 8.4 °C-0.1° to 16.4° | 1.7 mm/day | 85.9% | 5.4 m/s | 11.7 hours |
| April | 10.6 °C1.8° to 20.3° | 1.8 mm/day | 82% | 5.1 m/s | 13.4 hours |
| May | 13.9 °C5.1° to 23.9° | 1.8 mm/day | 80% | 4.9 m/s | 14.9 hours |
| June | 17 °C8.6° to 27.7° | 1.5 mm/day | 76.8% | 4.6 m/s | 15.7 hours |
| July | 19.1 °C11.1° to 29.9° | 1.3 mm/day | 73.1% | 4.6 m/s | 15.3 hours |
| August | 19.3 °C11° to 29.9° | 1.4 mm/day | 72.9% | 4.4 m/s | 14 hours |
| September | 16.8 °C8.5° to 26.7° | 1.8 mm/day | 76% | 4.7 m/s | 12.3 hours |
| October | 13.5 °C5° to 21.4° | 2.5 mm/day | 83.8% | 5.3 m/s | 10.5 hours |
| November | 9.9 °C1.6° to 17° | 2.8 mm/day | 88.6% | 5.6 m/s | 9.1 hours |
| December | 7.2 °C-1.7° to 13.8° | 2.9 mm/day | 91.2% | 6 m/s | 8.3 hours |
Comparative monthly averages for temperature, precipitation, humidity, wind, and daylight duration across the park
Interactive climate map
Visit the MoriAtlas climate map to compare long-term monthly temperature and precipitation metrics across national parks. This visual interface helps you understand seasonal variations at specific protected area coordinates to deepen your knowledge of global park geography and environmental characteristics.
Analyze monthly temperature, precipitation, and regional atmospheric patterns across diverse protected landscapes.





Examine the mapped boundaries and natural terrain of this unique French nature reserve. MoriAtlas provides a clear view into the ecological significance of the Grande Brière marshland and its role within the wider Atlantic wetland network.