Saint-Denis weather in December
December in Saint-Denis: sweltering, rainy, with clean air — an excellent time to visit.
#8 of 12 months in Saint-Denis · #78 of 604 destinations to visit in December · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Saint-Denis climate normals — December
| Daytime high | 28°C / 82°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 118 mm / 4.6 in | 🌧 rainy |
| Rainy days | 23 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 22°C / 71°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 13.4 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Saint-Denis?
Loading map…
Saint-Denis in December — FAQ
- Is December a good time to visit Saint-Denis?
- December in Saint-Denis: sweltering, rainy, with clean air — an excellent time to visit. It ranks #8 of 12 months for Saint-Denis on SeasonMap's comfort score (85/100).
- What is the weather like in Saint-Denis in December?
- In December, Saint-Denis averages a daily high of 28°C and a low of 24.2°C, with about 117.6 mm of rain over roughly 23.2 rainy days.
- What is the air quality in Saint-Denis in December?
- Saint-Denis has a mean US Air Quality Index of about 30 in December.