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
The onset of December in Sundsvall entails a subtle temperature shift, as the average high-temperature eases from an icy 2°C (35.6°F) in November to a freezing cold -1.3°C (29.7°F). Throughout December nights, Sundsvall records a consistent low-temperature averaging a still subzero cold -4.5°C (23.9°F).Humidity
In December, the average relative humidity in Sundsvall is 87%.Rainfall
In December, in Sundsvall, the rain falls for 7.3 days. Throughout December, 41mm (1.61") of precipitation is accumulated. Throughout the year, there are 117.2 rainfall days, and 384mm (15.12") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Sundsvall, in December, snow falls for 12.7 days, with typically accumulated 197mm (7.76") of snow. Throughout the year, in Sundsvall, there are 70.7 snowfall days, and 908mm (35.75") of snow is accumulated.Sea temperature
In December, the average sea temperature in Sundsvall is 3°C (37.4°F).Note: When swimming, this state is excessively cold, posing a lethal risk. Absent the protection of insulated waterproof wear, hypothermia is likely to occur immediately.
Daylight
December has the shortest days of the year in Sundsvall, Sweden, with an average of 5h and 12min of daylight.On the first day of the month, sunrise is at 08:48 and sunset at 14:30. On the last day of December, in Sundsvall, sunrise is at 09:18 and sunset at 14:29 CET.
Sunshine
With an average of 1.7h of sunshine, December has the least sunshine of the year in Sundsvall.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Sundsvall. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 1 suggests this advice:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold is December in Sundsvall?
What is the average humidity in December in Sundsvall?
How much does it rain in Sundsvall in December?
How much does it snow in Sundsvall in December?
What is the sea temperature in December in Sundsvall?
What is the month with the shortest days in Sundsvall?
How many hours of daylight does Sundsvall have in December?
What time are sunrise and sunset in December in Sundsvall?
What is the month with the least sunshine in Sundsvall?
How long on average sun shines in December in Sundsvall?
What is the month with the lowest UV index in Sundsvall?
What is the UV index intensity in December in Sundsvall?
Average temperature in December
Sundsvall, Sweden
- Average high temperature in December: -1.3°C
The warmest month (with the highest average high temperature) is July (20.3°C).
The month with the lowest average high temperature is January (-3°C).
- Average low temperature in December: -4.5°C
The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is February (-6.9°C).
Average pressure in December
Sundsvall, Sweden
- Average pressure in December: 1005.9mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.9mbar).
Average wind speed in December
Sundsvall, Sweden
- Average wind speed in December: 11.8km/h
The windiest month (with the highest average wind speed) is January (11.9km/h).
The calmest month (with the lowest average wind speed) is August (9.5km/h).
Average humidity in December
Sundsvall, Sweden
- Average humidity in December: 87%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is June (66%).
Average rainfall in December
Sundsvall, Sweden
- Average rainfall in December: 41mm
The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in December
Sundsvall, Sweden
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in December
Sundsvall, Sweden
- Average snowfall in December: 197mm
The month with the highest snowfall is January (217mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Sundsvall, Sweden
- Average snowfall days in December: 12.7 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Sundsvall, Sweden
- Average sea temperature in December: 3°C
The best month for swimming (with the highest average sea temperature) is August (15°C).
The coldest months (with the lowest average sea temperature) are January, February and March (1°C).
Average daylight in December /
Average sunshine in December
Sundsvall, Sweden
- Average daylight in December: 5h and 1min
The month with the longest days is June (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 5h and 12min).
- Average sunshine in December: 1h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in December
Sundsvall, Sweden
- Average sunshine days in December: 13.3 days
The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is February (12.5 days).
Average UV index in December
Sundsvall, Sweden
- Average UV index in December: 1
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 1).
Average cloud cover in December
Sundsvall, Sweden
- Average cloud cover in December: 61
The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in December
Sundsvall, Sweden
- Average visibility in December: 8km
The months with the highest visibility are April, May, June, July, August and October (9km).
The months with the lowest visibility are January, February and March (7km).
Sundsvall, Sweden
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