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
December
Weather in December
Temperature
With the arrival of December, Norrtälje experiences a modest decline in average high-temperatures, transitioning from an icy 5.5°C (41.9°F) in November to a still wintry 2°C (35.6°F). Norrtälje notes an average temperature descent to a freezing cold -0.6°C (30.9°F) in December, a small shift from its daytime peak.Humidity
In December, the average relative humidity is 85%.Rainfall
In Norrtälje, in December, it is raining for 10 days, with typically 30mm (1.18") of accumulated precipitation. In Norrtälje, during the entire year, the rain falls for 140.1 days and collects up to 354mm (13.94") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Norrtälje, in December, during 9.7 snowfall days, 56mm (2.2") of snow is typically accumulated. In Norrtälje, during the entire year, snow falls for 47.1 days and aggregates up to 311mm (12.24") of snow.Daylight
With an average of 6h and 6min of daylight, December has the shortest days of the year in Norrtälje.On the first day of December, sunrise is at 08:18 and sunset at 14:49. On the last day of the month, sunrise is at 08:45 and sunset at 14:51 CET.
Sunshine
December has the least sunshine of the year in Norrtälje, Sweden, with an average of 2.4h of sunshine.UV index
In December, the average daily maximum UV index in Norrtälje is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Norrtälje in December?
What is the average humidity in December in Norrtälje?
How many days does it rain in December in Norrtälje?
How much does it snow in Norrtälje in December?
What is the month with the shortest days in Norrtälje?
What is the average length of the day in December in Norrtälje?
What time are sunrise and sunset in December in Norrtälje?
What is the month with the least sunshine in Norrtälje?
How many hours of sunshine does Norrtälje have in December?
How high is the UV index in December in Norrtälje?
Average temperature in December
Norrtälje, Sweden
- Average high temperature in December: 2°C
The warmest months (with the highest average high temperature) are July and August (19.5°C).
The month with the lowest average high temperature is January (0.2°C).
- Average low temperature in December: -0.6°C
The months with the highest average low temperature are July and August (14.1°C).
The coldest months (with the lowest average low temperature) are January and February (-2.5°C).
Average pressure in December
Norrtälje, Sweden
- Average pressure in December: 1007.5mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.5mbar).
Average wind speed in December
Norrtälje, Sweden
- Average wind speed in December: 21.8km/h
The windiest month (with the highest average wind speed) is December (21.8km/h).
The calmest month (with the lowest average wind speed) is July (14.3km/h).
Average humidity in December
Norrtälje, Sweden
- Average humidity in December: 85%
The months with the highest relative humidity are February and November (86%).
The months with the lowest relative humidity are April, May and June (75%).
Average rainfall in December
Norrtälje, Sweden
- Average rainfall in December: 30mm
The wettest month (with the highest rainfall) is July (52mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in December
Norrtälje, Sweden
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is August (16.2 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Norrtälje, Sweden
- Average snowfall in December: 56mm
The month with the highest snowfall is February (82mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Norrtälje, Sweden
- Average snowfall days in December: 9.7 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Norrtälje, Sweden
- Average daylight in December: 6h and 1min
The month with the longest days is June (Average daylight: 18h and 36min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in December: 2h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in December
Norrtälje, Sweden
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is May (14.5 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in December
Norrtälje, 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 February (UV index 1).
Average cloud cover in December
Norrtälje, Sweden
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Norrtälje, Sweden
- Average visibility in December: 9km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, November and December (9km).
