December weather forecastBoissy-le-Châtel, France
December
Weather in December
The first month of the winter, December, is still a chilly month in Boissy-le-Châtel, France, with an average temperature varying between 6.7°C (44.1°F) and 2.5°C (36.5°F).Temperature
December brings a slight decrease in temperature, down from a cool 10°C (50°F) in November to a chilly 6.7°C (44.1°F). Boissy-le-Châtel maintains a minor drop in temperature during December nights, with averages of 2.5°C (36.5°F).Humidity
The most humid month in Boissy-le-Châtel is December, with an average relative humidity of 88%.Rainfall
The month with the most rainfall is December, when the rain falls for 17.8 days and typically aggregates up to 65mm (2.56") of precipitation.Snowfall
January through March, November and December are months with snowfall in Boissy-le-Châtel. In Boissy-le-Châtel, France, in December, snow falls for 2.6 days, with typically accumulated 20mm (0.79") of snow. In Boissy-le-Châtel, France, during the entire year, snow falls for 11.1 days and aggregates up to 84mm (3.31") of snow.Daylight
The month with the shortest days in Boissy-le-Châtel is December, with an average of 8h and 18min of daylight.On the first day of December in Boissy-le-Châtel, sunrise is at 08:19 and sunset at 16:53. On the last day of the month, sunrise is at 08:40 and sunset at 17:00 CET.
Sunshine
In Boissy-le-Châtel, France, the average sunshine in December is 4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Boissy-le-Châtel, France
- Average high temperature in December: 6.7°C
The warmest month (with the highest average high temperature) is August (24.3°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in December: 2.5°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is January (1.2°C).
Average pressure in December
Boissy-le-Châtel, France
- Average pressure in December: 1018.2mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in December
Boissy-le-Châtel, France
- Average wind speed in December: 15.6km/h
The windiest month (with the highest average wind speed) is February (15.9km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).
Average humidity in December
Boissy-le-Châtel, France
- Average humidity in December: 88%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (71%).
Average rainfall in December
Boissy-le-Châtel, France
- Average rainfall in December: 65mm
The wettest month (with the highest rainfall) is December (65mm).
The driest month (with the least rainfall) is September (28mm).
Average rainfall days in December
Boissy-le-Châtel, France
- Average rainfall days in December: 17.8 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is September (12.5 days).
Average snowfall in December
Boissy-le-Châtel, France
- Average snowfall in December: 20mm
The month with the highest snowfall is January (33mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Boissy-le-Châtel, France
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is January (3.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Boissy-le-Châtel, France
- Average daylight in December: 8h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Boissy-le-Châtel, France
- Average sunshine days in December: 9.2 days
The month with the most sunshine days is September (14.7 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in December
Boissy-le-Châtel, 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
Boissy-le-Châtel, France
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 38).
Average visibility in December
Boissy-le-Châtel, France
- Average visibility in December: 8km
The months with the highest visibility are February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, November and December (8km).
