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 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
Järna's December weather shows a modest shift in high-temperatures, falling from November's 4.9°C (40.8°F) to a still wintry 1.5°C (34.7°F). Nights during December maintain a steady temperature, averaging at a subzero cold -1.9°C (28.6°F).Humidity
January, February, November and December, with an average relative humidity of 88%, are the most humid months.Rainfall
In Järna, during December, the rain falls for 8.8 days and regularly aggregates up to 30mm (1.18") of precipitation. Throughout the year, in Järna, there are 131.4 rainfall days, and 350mm (13.78") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Järna, in December, snow falls for 8.7 days, with typically accumulated 62mm (2.44") of snow. Throughout the year, there are 45.7 snowfall days, and 309mm (12.17") of snow is accumulated.Daylight
The month with the shortest days in Järna is December, with an average of 6h and 18min of daylight.On the first day of the month, sunrise is at 08:18 and sunset at 14:59. On the last day of December, in Järna, Sweden, sunrise is at 08:43 and sunset at 15:01 CET.
Sunshine
With an average of 2.5h of sunshine, December has the least sunshine of the year.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 2 during December translates into these guidelines:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
How cold is December in Järna?
What are the most humid months in Järna?
What is the average humidity in December in Järna?
How much does it rain in Järna in December?
How many days does it snow in December in Järna?
What is the month with the shortest days in Järna?
How many hours of daylight does Järna have in December?
What time are sunrise and sunset in December in Järna?
What is the month with the least sunshine in Järna?
How many hours of sunshine does Järna have in December?
How high is the UV index in December in Järna?
Average temperature in December
Järna, Sweden
- Average high temperature in December: 1.5°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-0.5°C).
- Average low temperature in December: -1.9°C
The month with the highest average low temperature is July (13.2°C).
The coldest month (with the lowest average low temperature) is February (-3.6°C).
Average pressure in December
Järna, Sweden
- Average pressure in December: 1008mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in December
Järna, Sweden
- Average wind speed in December: 18km/h
The windiest month (with the highest average wind speed) is December (18km/h).
The calmest months (with the lowest average wind speed) are July and August (12.5km/h).
Average humidity in December
Järna, Sweden
- Average humidity in December: 88%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is May (72%).
Average rainfall in December
Järna, Sweden
- Average rainfall in December: 30mm
The wettest month (with the highest rainfall) is July (44mm).
The driest month (with the least rainfall) is April (15mm).
Average rainfall days in December
Järna, Sweden
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Järna, Sweden
- Average snowfall in December: 62mm
The month with the highest snowfall is February (87mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Järna, Sweden
- Average snowfall days in December: 8.7 days
The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Järna, Sweden
- Average daylight in December: 6h and 2min
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: 2h and 3min
The month with the most sunshine is June (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in December
Järna, Sweden
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is May (16.9 days).
The months with the least sunshine days are June and July (13.6 days).
Average UV index in December
Järna, Sweden
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Järna, Sweden
- Average cloud cover in December: 65
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Järna, Sweden
- Average visibility in December: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
Järna, Sweden
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