December weather forecastCastilly, France
December
Weather in December
December, the first month of the winter in Castilly, is still a chilly month, with an average temperature varying between 4.9°C (40.8°F) and 8.8°C (47.8°F).Temperature
December observes an average high-temperature of a chilly 8.8°C (47.8°F), marking an insignificant difference from November's 11°C (51.8°F). Castilly registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 4.9°C (40.8°F) during December.Humidity
January, November and December, with an average relative humidity of 86%, are the most humid months in Castilly.Rainfall
December is the month with the most rainfall. Rain falls for 18.4 days and accumulates 80mm (3.15") of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Castilly, France, during December, snow falls for 1.4 days and regularly aggregates up to 10mm (0.39") of snow. In Castilly, during the entire year, snow falls for 7.7 days and aggregates up to 43mm (1.69") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 18min of daylight.On the first day of December in Castilly, France, sunrise is at 08:38 and sunset at 17:08. On the last day of the month, sunrise is at 08:59 and sunset at 17:15 CET.
Sunshine
In December, the average sunshine in Castilly, France, is 4.1h.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Castilly, France
- Average high temperature in December: 8.8°C
The warmest month (with the highest average high temperature) is August (21°C).
The month with the lowest average high temperature is January (7.7°C).
- Average low temperature in December: 4.9°C
The month with the highest average low temperature is August (12.9°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).
Average pressure in December
Castilly, France
- Average pressure in December: 1017.3mbar
The month with the highest atmospheric pressure is September (1018mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in December
Castilly, France
- Average wind speed in December: 20.9km/h
The windiest month (with the highest average wind speed) is December (20.9km/h).
The calmest month (with the lowest average wind speed) is August (13.2km/h).
Average humidity in December
Castilly, France
- Average humidity in December: 86%
The months with the highest relative humidity are January, November and December (86%).
The months with the lowest relative humidity are July, August and September (81%).
Average rainfall in December
Castilly, France
- Average rainfall in December: 80mm
The wettest month (with the highest rainfall) is December (80mm).
The driest month (with the least rainfall) is September (25mm).
Average rainfall days in December
Castilly, France
- Average rainfall days in December: 18.4 days
The month with the highest number of rainy days is January (19.3 days).
The month with the least rainy days is September (13.1 days).
Average snowfall in December
Castilly, France
- Average snowfall in December: 10mm
The month with the highest snowfall is February (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Castilly, France
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (2.7 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
Castilly, France
- Average daylight in December: 8h and 18min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The months with the least sunshine are January and November (Average sunshine: 3h and 54min).
Average sunshine days in December
Castilly, France
- Average sunshine days in December: 7.7 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in December
Castilly, France
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Castilly, France
- Average cloud cover in December: 60
The months with the most cloud cover are January and November (Cloud cover 61).
The months with the least cloud cover are July and September (Cloud cover 42).
Average visibility in December
Castilly, France
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
