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 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
Weather in December
Temperature
At the start of December, Stornoway's average high-temperature reaches a still frosty 8.3°C (46.9°F), subtly different from the preceding month. Stornoway's nighttime temperature in December experiences a slight dip from daytime highs, falling to an average of 6.2°C (43.2°F).Humidity
The months with the lowest humidity are January, November and December, with an average relative humidity of 76%.Rainfall
The month with the most rainfall in Stornoway is December, when the rain falls for 25 days and typically aggregates up to 92mm (3.62") of precipitation.Snowfall
January through May, November and December are months with snowfall. In Stornoway, during December, snow falls for 1.4 days and regularly aggregates up to 9mm (0.35") of snow. Throughout the year, there are 7.1 snowfall days, and 74mm (2.91") of snow is accumulated.Sea temperature
In December, the average sea temperature in Stornoway is 9.8°C (49.6°F).Note: Dipping in 9.8°C (49.6°F) at temperatures less than 10°C (50°F) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
With an average of 6h and 30min of daylight, December has the shortest days of the year in Stornoway, United Kingdom.On the first day of December, sunrise is at 8:47 am and sunset at 3:41 pm. On the last day of the month, sunrise is at 9:12 am and sunset at 3:45 pm GMT.
Sunshine
The month with the least sunshine in Stornoway is December, with an average of 2.7h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
What are the temperatures in Stornoway in December?
What are the least humid months in Stornoway?
What is the average humidity in December in Stornoway?
What is the rainiest month in Stornoway?
How much does it rain in Stornoway in December?
How many days does it snow in December in Stornoway?
How cold is the water in December in Stornoway?
What is the month with the shortest days in Stornoway?
What is the average length of the day in December in Stornoway?
When is the sunrise / sunset in December in Stornoway?
What is the month with the least sunshine in Stornoway?
How many hours of sunshine does Stornoway have in December?
What is the month with the lowest UV index in Stornoway?
What is the UV index reading in December in Stornoway?
Average temperature in December
Stornoway, United Kingdom
- Average high temperature in December: 8.3°C
The warmest month (with the highest average high temperature) is August (14.8°C).
The month with the lowest average high temperature is February (7.4°C).
- Average low temperature in December: 6.2°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is February (5.6°C).
Average pressure in December
Stornoway, United Kingdom
- Average pressure in December: 1003.9mbar
The month with the highest atmospheric pressure is June (1014.2mbar).
The month with the lowest atmospheric pressure is December (1003.9mbar).
Average wind speed in December
Stornoway, United Kingdom
- Average wind speed in December: 34.5km/h
The windiest month (with the highest average wind speed) is January (35.6km/h).
The calmest month (with the lowest average wind speed) is July (20.5km/h).
Average humidity in December
Stornoway, United Kingdom
- Average humidity in December: 76%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, November and December (76%).
Average rainfall in December
Stornoway, United Kingdom
- Average rainfall in December: 92mm
The wettest month (with the highest rainfall) is December (92mm).
The driest months (with the least rainfall) are April and June (43mm).
Average rainfall days in December
Stornoway, United Kingdom
- Average rainfall days in December: 25 days
The month with the highest number of rainy days is December (25 days).
The month with the least rainy days is June (16.6 days).
Average snowfall in December
Stornoway, United Kingdom
- Average snowfall in December: 9mm
The month with the highest snowfall is February (30mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in December
Stornoway, United Kingdom
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Stornoway, United Kingdom
- Average sea temperature in December: 9.8°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 (7.6°C).
Average daylight in December /
Average sunshine in December
Stornoway, United Kingdom
- Average daylight in December: 6h and 3min
The month with the longest days is June (Average daylight: 18h and 6min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is June (Average sunshine: 7h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).
Average sunshine days in December
Stornoway, United Kingdom
- Average sunshine days in December: 3.2 days
The month with the most sunshine days is June (10.8 days).
The month with the least sunshine days is December (3.2 days).
Average UV index in December
Stornoway, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June, July and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Stornoway, United Kingdom
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are April and May (Cloud cover 57).
Average visibility in December
Stornoway, United Kingdom
- Average visibility in December: 9km
The months with the highest visibility are April and June (10km).
The months with the lowest visibility are January, February, March, May, July, August, September, October, November and December (9km).
Stornoway, United Kingdom
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