December weather forecastGrantham, United Kingdom
December
Weather in December
The first month of the winter, December, is still a chilly month in Grantham, United Kingdom, with an average temperature varying between 2.5°C (36.5°F) and 6.6°C (43.9°F).Temperature
November's transformation into December witnesses an average high-temperature of a still chilly 6.6°C (43.9°F), noting a minor change from the preceding month. During December's nights, Grantham notes a minor temperature decline, reaching an average of 2.5°C (36.5°F).Humidity
With an average relative humidity of 90%, December is the most humid month.Rainfall
In Grantham, during December, the rain falls for 11.5 days and regularly aggregates up to 19mm (0.75") of precipitation. In Grantham, during the entire year, the rain falls for 152.3 days and collects up to 262mm (10.31") of precipitation.Snowfall
January through April, November and December are months with snowfall in Grantham. In Grantham, United Kingdom, in December, during 1.6 snowfall days, 4mm (0.16") of snow is typically accumulated. Throughout the year, there are 8.8 snowfall days, and 42mm (1.65") of snow is accumulated.Daylight
December has the shortest days of the year in Grantham, with an average of 7h and 42min of daylight.On the first day of the month, sunrise is at 7:53 am and sunset at 3:50 pm. On the last day of December, sunrise is at 8:15 am and sunset at 3:56 pm GMT.
Sunshine
In December, the average sunshine is 4.4h.UV index
The months with the lowest UV index in Grantham 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 average person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Grantham, United Kingdom
- Average high temperature in December: 6.6°C
The warmest month (with the highest average high temperature) is July (20.7°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 (12.8°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in December
Grantham, United Kingdom
- Average pressure in December: 1012.8mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in December
Grantham, United Kingdom
- Average wind speed in December: 18.5km/h
The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in December
Grantham, United Kingdom
- Average humidity in December: 90%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (77%).
Average rainfall in December
Grantham, United Kingdom
- Average rainfall in December: 19mm
The wettest month (with the highest rainfall) is June (37mm).
The driest months (with the least rainfall) are March and April (15mm).
Average rainfall days in December
Grantham, United Kingdom
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (8.9 days).
Average snowfall in December
Grantham, United Kingdom
- Average snowfall in December: 4mm
The month with the highest snowfall is January (17mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Grantham, United Kingdom
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3.1 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
Grantham, United Kingdom
- Average daylight in December: 7h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in December: 4h and 24min
The months with the most sunshine are July and August (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in December
Grantham, United Kingdom
- Average sunshine days in December: 15.9 days
The months with the most sunshine days are October and December (15.9 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Grantham, United Kingdom
- 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
Grantham, United Kingdom
- Average cloud cover in December: 56
The month with the most cloud cover is November (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 49).
Average visibility in December
Grantham, United Kingdom
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, July, August, September, October and December (9km).
The months with the lowest visibility are June and November (8km).
