Saint-Denis weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Good
Best time to visit: June – December
What is the weather like in Saint-Denis in December?
In December, Saint-Denis is warm: daytime highs average 27 °C, and even at night it stays warm at around 24 °C. The sea averages 27.1 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. It is the rainy season: rain falls on about 20 days, totalling 132 mm. The air is often humid and muggy. All in all, December is a good month for a holiday in Saint-Denis.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 74 | 70 | 65 |
| Day | 26° | 27° | 27° |
| Night | 22° | 24° | 25° |
| Sea | 26° | 27° | 28° |
| Sun | 9 h | 9 h | 8 h |
| Rain days | 16 | 20 | 22 |
More details for December
- Daylight
- 13 h 23 min05:32 – 18:55
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 11 km/haverage daily peakAll months
- Cloud cover
- 58 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+4Indian/Reunion
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Saint-Denis in December: quick answers
Is Saint-Denis hot in December?
Warm rather than hot: in December, daytime highs in Saint-Denis average 27 °C and nights cool to about 24 °C.
Can you swim in Saint-Denis in December?
Yes. In December the sea averages 27.1 °C – lovely and warm for swimming.
Does it rain much in Saint-Denis in December?
It rains often – on about 20 days, adding up to 132 mm.
Saint-Denis month by month
The whole year in Saint-DenisAll destinations: RéunionWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences