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 onset brings a negligible change in high-temperatures, falling from a wintry 3.7°C (38.7°F) in November to a still icy 0.2°C (32.4°F). Throughout December, a minimal difference from peak daytime temperatures is noted, marking a steady low-temperature average of -2.4°C (27.7°F).Humidity
In December, the average relative humidity is 87%.Rainfall
In December, the rain falls for 11.8 days. Throughout December, 41mm (1.61") of precipitation is accumulated. In Iskmo, during the entire year, the rain falls for 151.1 days and collects up to 508mm (20") of precipitation.Snowfall
January through May, October through December are months with snowfall. In Iskmo, in December, during 16.5 snowfall days, 126mm (4.96") of snow is typically accumulated. In Iskmo, during the entire year, snow falls for 85.8 days and aggregates up to 679mm (26.73") of snow.Daylight
With an average of 4h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 09:40 and sunset at 15:04. On the last day of December, sunrise is at 10:11 and sunset at 15:01 EET.
Sunshine
The month with the least sunshine is December, with an average of 1.4h of sunshine.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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?
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 Iskmo?
What time are sunrise and sunset in December?
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?
What is the UV index intensity in December?
Average temperature in December
Iskmo, Finland
- Average high temperature in December: 0.2°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is February (-2.8°C).
- Average low temperature in December: -2.4°C
The month with the highest average low temperature is August (13.4°C).
The coldest month (with the lowest average low temperature) is February (-6.7°C).
Average pressure in December
Iskmo, Finland
- Average pressure in December: 1005.6mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.6mbar).
Average wind speed in December
Iskmo, Finland
- Average wind speed in December: 21.4km/h
The windiest month (with the highest average wind speed) is December (21.4km/h).
The calmest month (with the lowest average wind speed) is July (15km/h).
Average humidity in December
Iskmo, Finland
- Average humidity in December: 87%
The month with the highest relative humidity is February (91%).
The months with the lowest relative humidity are May and June (74%).
Average rainfall in December
Iskmo, Finland
- Average rainfall in December: 41mm
The wettest month (with the highest rainfall) is August (59mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in December
Iskmo, Finland
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is August (17 days).
The month with the least rainy days is February (6 days).
Average snowfall in December
Iskmo, Finland
- Average snowfall in December: 126mm
The month with the highest snowfall is March (155mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Iskmo, Finland
- Average snowfall days in December: 16.5 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Iskmo, Finland
- Average daylight in December: 4h and 5min
The month with the longest days is June (Average daylight: 20h and 12min).
The month with the shortest days is December (Average daylight: 4h and 48min).
- Average sunshine in December: 1h 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: 1h and 24min).
Average sunshine days in December
Iskmo, Finland
- Average sunshine days in December: 6.8 days
The month with the most sunshine days is May (15.2 days).
The month with the least sunshine days is December (6.8 days).
Average UV index in December
Iskmo, 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 and December (UV index 1).
Average cloud cover in December
Iskmo, Finland
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in December
Iskmo, Finland
- Average visibility in December: 9km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February and March (8km).
