Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The transition into December is marked with an average high-temperature of a still cool 11.3°C (52.3°F), showing an insignificant shift from November's 12.5°C (54.5°F). Night temperatures during December experience a slight downturn, averaging a chilly 9.6°C (49.3°F).Humidity
January, February, November and December, with an average relative humidity of 78%, are the least humid months.Rainfall
In December, the rain falls for 20.7 days. Throughout December, 71mm (2.8") of precipitation is accumulated. In Isles of Scilly, during the entire year, the rain falls for 200.8 days and collects up to 599mm (23.58") of precipitation.Snowfall
January, February, April through September, November and December are months without snowfall.Sea temperature
In Isles of Scilly, in December, the average water temperature is 11.9°C (53.4°F).Note: Navigating the 11.9°C (53.4°F) at 13°C (55.4°F) is no joy, and temperatures less than 10°C (50°F) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
With an average of 8h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 8:02 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 8:23 am and sunset at 4:33 pm GMT.
Sunshine
With an average of 3.9h of sunshine, December has the least sunshine of the year.UV index
January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 3 transforms into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the least humid month?
What is the average humidity in December?
How many days does it rain in December?
When it does not snow?
How cold is the water in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December in Isles of Scilly?
What is the month with the least sunshine?
How many hours of sunshine does Isles of Scilly have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Isles of Scilly, United Kingdom
- Average high temperature in December: 11.3°C
The warmest month (with the highest average high temperature) is August (17.2°C).
The month with the lowest average high temperature is February (9.7°C).
- Average low temperature in December: 9.6°C
The month with the highest average low temperature is August (15.9°C).
The coldest month (with the lowest average low temperature) is February (7.9°C).
Average pressure in December
Isles of Scilly, United Kingdom
- Average pressure in December: 1015.1mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).
Average wind speed in December
Isles of Scilly, United Kingdom
- Average wind speed in December: 35.9km/h
The windiest month (with the highest average wind speed) is December (35.9km/h).
The calmest month (with the lowest average wind speed) is July (23.8km/h).
Average humidity in December
Isles of Scilly, United Kingdom
- Average humidity in December: 78%
The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are January, February, November and December (78%).
Average rainfall in December
Isles of Scilly, United Kingdom
- Average rainfall in December: 71mm
The wettest month (with the highest rainfall) is November (86mm).
The driest month (with the least rainfall) is May (29mm).
Average rainfall days in December
Isles of Scilly, United Kingdom
- Average rainfall days in December: 20.7 days
The month with the highest number of rainy days is November (21.3 days).
The month with the least rainy days is June (13.1 days).
Average snowfall days in December
Isles of Scilly, United Kingdom
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is March (0.2 days).
The months with the least snowfall days are January, February, April, May, June, July, August, September, November and December (0 days).
Average sea temperature in December
Isles of Scilly, United Kingdom
- Average sea temperature in December: 11.9°C
The best month for swimming (with the highest average sea temperature) is August (17.3°C).
The coldest month (with the lowest average sea temperature) is March (10.1°C).
Average daylight in December /
Average sunshine in December
Isles of Scilly, United Kingdom
- Average daylight in December: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in December
Isles of Scilly, United Kingdom
- Average sunshine days in December: 6.3 days
The month with the most sunshine days is June (15 days).
The month with the least sunshine days is November (5.7 days).
Average UV index in December
Isles of Scilly, United Kingdom
- Average UV index in December: 3
The month with the highest UV index is August (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in December
Isles of Scilly, United Kingdom
- Average cloud cover in December: 62
The months with the most cloud cover are January and December (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 44).
Average visibility in December
Isles of Scilly, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
