December weather forecastRennes, France
December
Weather in December
The year ends in Rennes, France, amid a colder climate and shorter days, asserting the dominance of winter. The temperature tops out at 9.1°C (48.4°F), and the lower limit freezes at 4.2°C (39.6°F), while the snowfall is at its peak with 2mm (0.08") recorded. Decreased daylight time emphasizes the winter atmosphere, while heightened precipitation adds an extra chill. Concluding the year, December characterizes the severe winter conditions, including lower temperatures, reduced sunlight hours, frequent rain, and occasional snowfall.Temperature
December's onset in Rennes, France, sees an average high-temperature of a frosty 9.1°C (48.4°F), exhibiting a slight fluctuation from the previous month. Rennes reports an average low temperature of 4.2°C (39.6°F) in December, a minor decrease from the day's highs.Humidity
December is the most humid month, with an average relative humidity of 88%.Rainfall
In Rennes, during December, the rain falls for 12.2 days and regularly aggregates up to 34mm (1.34") of precipitation. Throughout the year, there are 150.1 rainfall days, and 330mm (12.99") of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Rennes. The months with the most snowfall are February through April and December, with an average 2mm (0.08") of accumulated snow.Daylight
December has the shortest days of the year, with an average of 8h and 24min of daylight.On the first day of December, sunrise is at 08:36 and sunset at 17:15. On the last day of the month, sunrise is at 08:56 and sunset at 17:22 CET.
Sunshine
In December, the average sunshine is 4.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rennes, France
- Average high temperature in December: 9.1°C
The warmest month (with the highest average high temperature) is August (23.1°C).
The month with the lowest average high temperature is January (8.4°C).
- Average low temperature in December: 4.2°C
The month with the highest average low temperature is July (12.8°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in December
Rennes, France
- Average pressure in December: 1018.4mbar
The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is November (1012.9mbar).
Average wind speed in December
Rennes, France
- Average wind speed in December: 16.8km/h
The windiest month (with the highest average wind speed) is February (17.6km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in December
Rennes, France
- Average humidity in December: 88%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are July, August and September (78%).
Average rainfall in December
Rennes, France
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is June (39mm).
The driest month (with the least rainfall) is September (12mm).
Average rainfall days in December
Rennes, France
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is September (8.4 days).
Average snowfall in December
Rennes, France
- Average snowfall in December: 2mm
The months with the highest snowfall are February, March, April and December (2mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Rennes, France
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rennes, France
- Average daylight in December: 8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Rennes, France
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in December
Rennes, France
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Rennes, France
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 41).
Average visibility in December
Rennes, France
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, June, July, October, November and December (9km).
The months with the lowest visibility are May, August and September (8km).
