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
December's arrival signals a moderate reduction in the average high-temperature, easing from an icy 3.5°C (38.3°F) in November to a still wintry 0.3°C (32.5°F). Night temperatures during December in Härnösand stabilize at an average of -2.5°C (27.5°F), closely mirroring the daytime temperatures.Humidity
In December, the average relative humidity in Härnösand is 84%.Rainfall
The wettest months are January and December, with an average 36mm (1.42") of rainfall.Snowfall
Months with snowfall in Härnösand are January through May, October through December. In December, it is snowing for 10.4 days. Throughout December, 94mm (3.7") of snow is accumulated. In Härnösand, during the entire year, snow falls for 60.8 days and aggregates up to 495mm (19.49") of snow.Sea temperature
In Härnösand, in December, the average water temperature is 3.2°C (37.8°F).Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.
Daylight
With an average of 5h and 6min of daylight, December has the shortest days of the year in Härnösand.On the first day of December, sunrise is at 08:49 and sunset at 14:25. On the last day of the month, sunrise is at 09:18 and sunset at 14:24 CET.
Sunshine
The month with the least sunshine in Härnösand is December, with an average of 1.8h of sunshine.UV index
The average daily maximum UV index in December in Härnösand is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Härnösand?
What is the average humidity in December in Härnösand?
What is the rainiest month in Härnösand?
How much does it rain in Härnösand in December?
How much does it snow in Härnösand in December?
What is the water temperature in December in Härnösand?
What is the month with the shortest days in Härnösand?
What is the average length of the day in December in Härnösand?
When is the sunrise / sunset in December in Härnösand?
What is the month with the least sunshine in Härnösand?
How long on average sun shines in December in Härnösand?
What is the UV index intensity in December in Härnösand?
Average temperature in December
Härnösand, Sweden
- Average high temperature in December: 0.3°C
The warmest month (with the highest average high temperature) is July (18.2°C).
The month with the lowest average high temperature is February (-1.8°C).
- Average low temperature in December: -2.5°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is February (-5°C).
Average pressure in December
Härnösand, Sweden
- Average pressure in December: 1005.8mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.8mbar).
Average wind speed in December
Härnösand, Sweden
- Average wind speed in December: 18.8km/h
The windiest month (with the highest average wind speed) is December (18.8km/h).
The calmest months (with the lowest average wind speed) are May and August (13.9km/h).
Average humidity in December
Härnösand, Sweden
- Average humidity in December: 84%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (71%).
Average rainfall in December
Härnösand, Sweden
- Average rainfall in December: 36mm
The wettest months (with the highest rainfall) are January and December (36mm).
The driest months (with the least rainfall) are April and June (15mm).
Average rainfall days in December
Härnösand, Sweden
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is July (10.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Härnösand, Sweden
- Average snowfall in December: 94mm
The month with the highest snowfall is January (150mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Härnösand, Sweden
- Average snowfall days in December: 10.4 days
The month with the highest number of snowfall days is January (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Härnösand, Sweden
- Average sea temperature in December: 3.2°C
The best month for swimming (with the highest average sea temperature) is August (17°C).
The coldest months (with the lowest average sea temperature) are February and March (0.3°C).
Average daylight in December /
Average sunshine in December
Härnösand, Sweden
- Average daylight in December: 5h and 1min
The month with the longest days is June (Average daylight: 19h and 54min).
The month with the shortest days is December (Average daylight: 5h and 6min).
- Average sunshine in December: 1h and 5min
The month with the most sunshine is June (Average sunshine: 13h and 6min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in December
Härnösand, Sweden
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is June (21.8 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in December
Härnösand, Sweden
- 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 and November (UV index 1).
Average cloud cover in December
Härnösand, Sweden
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Härnösand, Sweden
- Average visibility in December: 9km
The months with the highest visibility are May, June, July, August, September and October (10km).
The month with the lowest visibility is January (8km).
Härnösand, Sweden
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