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
Yli-Ii's progression into December involves a minor drop in the average high-temperature, slightly receding from an icy 1.1°C (34°F) in November to a freezing cold -3°C (26.6°F). Yli-Ii's nights in December maintain a consistent average of -6.4°C (20.5°F), demonstrating a minimal differential from its daytime temperature.Humidity
The average relative humidity in December in Yli-Ii, Finland, is 93%.Rainfall
In Yli-Ii, in December, during 6.4 rainfall days, 44mm (1.73") of precipitation is typically accumulated. Throughout the year, in Yli-Ii, there are 117.3 rainfall days, and 434mm (17.09") of precipitation is accumulated.Snowfall
Months with snowfall in Yli-Ii, Finland, are January through May, September through December. In Yli-Ii, in December, snow falls for 20.9 days, with typically accumulated 230mm (9.06") of snow. Throughout the year, there are 107.1 snowfall days, and 1131mm (44.53") of snow is accumulated.Daylight
December has the shortest days of the year in Yli-Ii, with an average of 3h and 36min of daylight.On the first day of December, sunrise is at 09:53 and sunset at 14:17. On the last day of the month, sunrise is at 10:30 and sunset at 14:08 EET.
Sunshine
With an average of 1h of sunshine, December has the least sunshine of the year in Yli-Ii, Finland.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 minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 suggests these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. 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 it in Yli-Ii in December?
What is the average humidity in December in Yli-Ii?
How many days does it rain in December in Yli-Ii?
How much does it snow in Yli-Ii in December?
What is the month with the shortest days in Yli-Ii?
How many hours of daylight does Yli-Ii have in December?
When are sunrise and sunset in December in Yli-Ii?
What is the month with the least sunshine in Yli-Ii?
How long on average sun shines in December in Yli-Ii?
What are the months with the lowest UV index in Yli-Ii?
What is the UV index reading in December in Yli-Ii?
Average temperature in December
Yli-Ii, Finland
- Average high temperature in December: -3°C
The warmest month (with the highest average high temperature) is July (20°C).
The month with the lowest average high temperature is January (-6.1°C).
- Average low temperature in December: -6.4°C
The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is January (-10.6°C).
Average pressure in December
Yli-Ii, Finland
- Average pressure in December: 1005.4mbar
The month with the highest atmospheric pressure is May (1014mbar).
The month with the lowest atmospheric pressure is December (1005.4mbar).
Average wind speed in December
Yli-Ii, Finland
- Average wind speed in December: 13.5km/h
The windiest month (with the highest average wind speed) is November (13.7km/h).
The calmest month (with the lowest average wind speed) is July (10.6km/h).
Average humidity in December
Yli-Ii, Finland
- Average humidity in December: 93%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is June (69%).
Average rainfall in December
Yli-Ii, Finland
- Average rainfall in December: 44mm
The wettest month (with the highest rainfall) is July (59mm).
The driest months (with the least rainfall) are April and September (25mm).
Average rainfall days in December
Yli-Ii, Finland
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Yli-Ii, Finland
- Average snowfall in December: 230mm
The month with the highest snowfall is March (232mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in December
Yli-Ii, Finland
- Average snowfall days in December: 20.9 days
The month with the highest number of snowfall days is January (21.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Yli-Ii, Finland
- Average daylight in December: 3h and 4min
The month with the longest days is June (Average daylight: 22h and 6min).
The month with the shortest days is December (Average daylight: 3h and 36min).
- Average sunshine in December: 1h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 0min).
Average sunshine days in December
Yli-Ii, Finland
- Average sunshine days in December: 7.4 days
The month with the most sunshine days is June (17 days).
The month with the least sunshine days is December (7.4 days).
Average UV index in December
Yli-Ii, 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
Yli-Ii, Finland
- Average cloud cover in December: 76
The month with the most cloud cover is February (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 43).
Average visibility in December
Yli-Ii, Finland
- Average visibility in December: 7km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February and March (6km).
Yli-Ii, Finland
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