December weather forecastStromness, United Kingdom
December
Weather in December
December, the first month of the winter in Stromness, is still a chilly month, with temperature in the range of an average low of 6.5°C (43.7°F) and an average high of 8.5°C (47.3°F).Temperature
The initiation of December sees an average high-temperature of a still frosty 8.5°C (47.3°F), showing minor variations from the previous month. Stromness logs an average low-temperature of 6.5°C (43.7°F) during the nights of December, subtly lower than its daytime highs.Humidity
The months with the lowest humidity are January and December, with an average relative humidity of 75%.Rainfall
The wettest months are January and December, with an average 60mm (2.36") of rainfall.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 0.8 days. Throughout December, 4mm (0.16") of snow is accumulated. In Stromness, during the entire year, snow falls for 4.8 days and aggregates up to 23mm (0.91") of snow.Sea temperature
In December, the average sea temperature is 9.3°C (48.7°F).Note: Swimming in 9.3°C (48.7°F) feels unbearing at 13°C (55.4°F) and can be life-risking below 10°C (50°F), causing breathing issues and cold shock, depending on a person's capacity.
Daylight
The month with the shortest days in Stromness is December, with an average of 6h and 18min of daylight.On the first day of December, sunrise is at 8:40 am and sunset at 3:23 pm. On the last day of the month, sunrise is at 9:06 am and sunset at 3:26 pm GMT.
Sunshine
The month with the least sunshine in Stromness is December, with an average of 3.1h of sunshine.UV index
The months with the lowest UV index in Stromness, United Kingdom, are January through March and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Stromness, United Kingdom
- Average high temperature in December: 8.5°C
The warmest month (with the highest average high temperature) is August (14.2°C).
The month with the lowest average high temperature is February (7°C).
- Average low temperature in December: 6.5°C
The month with the highest average low temperature is August (12.4°C).
The coldest month (with the lowest average low temperature) is February (5.5°C).
Average pressure in December
Stromness, United Kingdom
- Average pressure in December: 1003.7mbar
The months with the highest atmospheric pressure are May and June (1014.4mbar).
The month with the lowest atmospheric pressure is December (1003.7mbar).
Average wind speed in December
Stromness, United Kingdom
- Average wind speed in December: 37.5km/h
The windiest month (with the highest average wind speed) is January (38.7km/h).
The calmest months (with the lowest average wind speed) are June and July (22.5km/h).
Average humidity in December
Stromness, United Kingdom
- Average humidity in December: 75%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are January and December (75%).
Average rainfall in December
Stromness, United Kingdom
- Average rainfall in December: 60mm
The wettest months (with the highest rainfall) are January and December (60mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in December
Stromness, United Kingdom
- Average rainfall days in December: 23.5 days
The month with the highest number of rainy days is December (23.5 days).
The month with the least rainy days is June (15.5 days).
Average snowfall in December
Stromness, United Kingdom
- Average snowfall in December: 4mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Stromness, United Kingdom
- Average snowfall days in December: 0.8 days
The months with the highest number of snowfall days are February and March (1.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Stromness, United Kingdom
- Average sea temperature in December: 9.3°C
The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (7.3°C).
Average daylight in December /
Average sunshine in December
Stromness, United Kingdom
- Average daylight in December: 6h and 18min
The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is June (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in December
Stromness, United Kingdom
- Average sunshine days in December: 4.8 days
The month with the most sunshine days is May (11.4 days).
The month with the least sunshine days is December (4.8 days).
Average UV index in December
Stromness, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are June, July and September (UV index 4).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in December
Stromness, United Kingdom
- Average cloud cover in December: 65
The months with the most cloud cover are January and March (Cloud cover 67).
The months with the least cloud cover are April and May (Cloud cover 56).
Average visibility in December
Stromness, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and March (9km).
