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
December's arrival comes with a mild decrease in the average high-temperature, moving subtly from a wintry 0.8°C (33.4°F) in November to a subzero cold -3.2°C (26.2°F). Throughout December, a modest shift from daytime highs is anticipated, with an average low-temperature of -6.6°C (20.1°F).Humidity
In Merijärvi, the average relative humidity in December is 94%.Rainfall
In Merijärvi, during December, the rain falls for 5.7 days and regularly aggregates up to 33mm (1.3") of precipitation. Throughout the year, there are 118.8 rainfall days, and 391mm (15.39") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Merijärvi. December is the month with the most snowfall. Snow falls for 21.5 days and accumulates 200mm (7.87") of snow.Daylight
The month with the shortest days is December, with an average of 4h and 18min of daylight.On the first day of the month, sunrise is at 09:43 and sunset at 14:39. On the last day of December, sunrise is at 10:16 and sunset at 14:34 EET.
Sunshine
With an average of 0.9h of sunshine, December has the least sunshine of the year.UV index
January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 1 in December transforms into this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Merijärvi?
When are sunrise and sunset in December in Merijärvi?
What is the month with the least sunshine?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Merijärvi, Finland
- Average high temperature in December: -3.2°C
The warmest month (with the highest average high temperature) is July (21°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in December: -6.6°C
The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is January (-10°C).
Average pressure in December
Merijärvi, Finland
- Average pressure in December: 1006mbar
The month with the highest atmospheric pressure is May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1006mbar).
Average wind speed in December
Merijärvi, Finland
- Average wind speed in December: 11.5km/h
The windiest month (with the highest average wind speed) is December (11.5km/h).
The calmest month (with the lowest average wind speed) is July (8.9km/h).
Average humidity in December
Merijärvi, Finland
- Average humidity in December: 94%
The month with the highest relative humidity is January (96%).
The month with the lowest relative humidity is June (67%).
Average rainfall in December
Merijärvi, Finland
- Average rainfall in December: 33mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in December
Merijärvi, Finland
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Merijärvi, Finland
- Average snowfall in December: 200mm
The month with the highest snowfall is December (200mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Merijärvi, Finland
- Average snowfall days in December: 21.5 days
The month with the highest number of snowfall days is January (21.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Merijärvi, Finland
- Average daylight in December: 4h and 2min
The month with the longest days is June (Average daylight: 21h and 0min).
The month with the shortest days is December (Average daylight: 4h and 18min).
- Average sunshine in December: 0h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).
Average sunshine days in December
Merijärvi, Finland
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (8.5 days).
Average UV index in December
Merijärvi, Finland
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Merijärvi, Finland
- Average cloud cover in December: 79
The month with the most cloud cover is January (Cloud cover 80).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in December
Merijärvi, Finland
- Average visibility in December: 6km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January and February (5km).
