December weather forecastGilly, Belgium
December
Weather in December
The first month of the winter, December, is still a cold month in Gilly, Belgium, with an average temperature ranging between min 1.9°C (35.4°F) and max 5.8°C (42.4°F).Temperature
December is characterized by a slight reduction in average high-temperature, easing from a frosty 9.2°C (48.6°F) in November to a wintry 5.8°C (42.4°F). The month of December is marked by an average minimum temperature of 1.9°C (35.4°F), slightly cooler than its daytime counterpart.Humidity
The most humid month in Gilly is December, with an average relative humidity of 89%.Rainfall
The month with the most rainfall in Gilly is December, when the rain falls for 15.1 days and typically aggregates up to 60mm (2.36") of precipitation.Snowfall
Months with snowfall are January through March, October through December. In Gilly, Belgium, in December, during 3.4 snowfall days, 38mm (1.5") of snow is typically accumulated. In Gilly, during the entire year, snow falls for 16.2 days and aggregates up to 154mm (6.06") of snow.Daylight
December has the shortest days of the year in Gilly, with an average of 8h and 6min of daylight.On the first day of December in Gilly, sunrise is at 08:21 and sunset at 16:41. On the last day of the month, sunrise is at 08:42 and sunset at 16:48 CET.
Sunshine
The months with the least sunshine in Gilly, Belgium, are January and December, with an average of 3.5h of sunshine.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 estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Gilly, Belgium
- Average high temperature in December: 5.8°C
The warmest month (with the highest average high temperature) is August (22.4°C).
The month with the lowest average high temperature is January (4.6°C).
- Average low temperature in December: 1.9°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (0.6°C).
Average pressure in December
Gilly, Belgium
- Average pressure in December: 1016.8mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1012.8mbar).
Average wind speed in December
Gilly, Belgium
- Average wind speed in December: 18.7km/h
The windiest month (with the highest average wind speed) is December (18.7km/h).
The calmest month (with the lowest average wind speed) is August (11.6km/h).
Average humidity in December
Gilly, Belgium
- Average humidity in December: 89%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
Gilly, Belgium
- Average rainfall in December: 60mm
The wettest month (with the highest rainfall) is December (60mm).
The driest month (with the least rainfall) is September (28mm).
Average rainfall days in December
Gilly, Belgium
- Average rainfall days in December: 15.1 days
The month with the highest number of rainy days is August (17.8 days).
The month with the least rainy days is February (12.1 days).
Average snowfall in December
Gilly, Belgium
- Average snowfall in December: 38mm
The month with the highest snowfall is February (47mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in December
Gilly, Belgium
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Gilly, Belgium
- Average daylight in December: 8h and 6min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in December: 3h and 30min
The month with the most sunshine is July (Average sunshine: 8h and 48min).
The months with the least sunshine are January and December (Average sunshine: 3h and 30min).
Average sunshine days in December
Gilly, Belgium
- Average sunshine days in December: 11.5 days
The months with the most sunshine days are March and September (14.2 days).
The month with the least sunshine days is August (10.4 days).
Average UV index in December
Gilly, Belgium
- Average UV index in December: 2
The months with the highest UV index are June and 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
Gilly, Belgium
- Average cloud cover in December: 65
The months with the most cloud cover are January and December (Cloud cover 65).
The months with the least cloud cover are April and August (Cloud cover 44).
Average visibility in December
Gilly, Belgium
- Average visibility in December: 8km
The months with the highest visibility are February, March, April, May, June, July, August and October (9km).
The months with the lowest visibility are January, September, November and December (8km).
