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
The onset of December results in a small decrease in the average high-temperature, moderately receding from a cold 0.2°C (32.4°F) in November to a subzero cold -3.9°C (25°F). Ilomantsi's average temperature throughout the nights in December exhibits a minor decrease from daytime highs, stabilizing at -7.5°C (18.5°F).Humidity
In Ilomantsi, the average relative humidity in December is 95%.Rainfall
In Ilomantsi, in December, it is raining for 4.9 days, with typically 43mm (1.69") of accumulated precipitation. Throughout the year, there are 111.3 rainfall days, and 434mm (17.09") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Ilomantsi, Finland. December is the month with the most snowfall. Snow falls for 23.8 days and accumulates 279mm (10.98") of snow.Daylight
With an average of 5h and 6min of daylight, December has the shortest days of the year in Ilomantsi.On the first day of the month, sunrise is at 08:57 and sunset at 14:33. On the last day of December, in Ilomantsi, Finland, sunrise is at 09:27 and sunset at 14:31 EET.
Sunshine
With an average of 0.6h of sunshine, December has the least sunshine of the year in Ilomantsi.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Ilomantsi in December?
What is the average humidity in December in Ilomantsi?
How much does it rain in Ilomantsi in December?
When does it snow the most in Ilomantsi?
How much does it snow in Ilomantsi in December?
What is the month with the shortest days in Ilomantsi?
What is the average length of the day in December in Ilomantsi?
What time are sunrise and sunset in December in Ilomantsi?
What is the month with the least sunshine in Ilomantsi?
How many hours of sunshine does Ilomantsi have in December?
What are the months with the lowest UV index in Ilomantsi?
What is the UV index reading in December in Ilomantsi?
Average temperature in December
Ilomantsi, Finland
- Average high temperature in December: -3.9°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 (-7.2°C).
- Average low temperature in December: -7.5°C
The month with the highest average low temperature is July (11.6°C).
The coldest month (with the lowest average low temperature) is January (-11.7°C).
Average pressure in December
Ilomantsi, Finland
- Average pressure in December: 1008.7mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.7mbar).
Average wind speed in December
Ilomantsi, Finland
- Average wind speed in December: 12.1km/h
The windiest month (with the highest average wind speed) is December (12.1km/h).
The calmest month (with the lowest average wind speed) is July (9.7km/h).
Average humidity in December
Ilomantsi, Finland
- Average humidity in December: 95%
The months with the highest relative humidity are January and February (96%).
The months with the lowest relative humidity are May and June (68%).
Average rainfall in December
Ilomantsi, Finland
- Average rainfall in December: 43mm
The wettest month (with the highest rainfall) is July (52mm).
The driest month (with the least rainfall) is June (25mm).
Average rainfall days in December
Ilomantsi, Finland
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
Ilomantsi, Finland
- Average snowfall in December: 279mm
The month with the highest snowfall is December (279mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in December
Ilomantsi, Finland
- Average snowfall days in December: 23.8 days
The month with the highest number of snowfall days is December (23.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Ilomantsi, Finland
- 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: 0h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 0h and 36min).
Average sunshine days in December
Ilomantsi, Finland
- Average sunshine days in December: 6.5 days
The month with the most sunshine days is May (18 days).
The month with the least sunshine days is December (6.5 days).
Average UV index in December
Ilomantsi, 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, October, November and December (UV index 1).
Average cloud cover in December
Ilomantsi, Finland
- Average cloud cover in December: 86
The months with the most cloud cover are February and December (Cloud cover 86).
The month with the least cloud cover is July (Cloud cover 45).
Average visibility in December
Ilomantsi, 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, February and March (5km).
