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
During the shift to December, Posio records a mild decrease in average high-temperature, moving from -1.7°C (28.9°F) in November to a still subzero cold -5.6°C (21.9°F). Posio sustains an average of approximately a still subzero cold -9.5°C (14.9°F) during December nights, with little variation from daytime highs.Humidity
In Posio, the average relative humidity in December is 96%.Rainfall
In Posio, in December, it is raining for 2.8 days, with typically 37mm (1.46") of accumulated precipitation. In Posio, during the entire year, the rain falls for 117.1 days and collects up to 485mm (19.09") of precipitation.Snowfall
Months with snowfall are January through June, September through December. December is the month with the most snowfall. Snow falls for 24.5 days and accumulates 283mm (11.14") of snow.Daylight
The month with the shortest days is December, with an average of 3h and 6min of daylight.On the first day of the month, sunrise is at 09:57 and sunset at 13:55. On the last day of December, in Posio, sunrise is at 10:38 and sunset at 13:42 EET.
Sunshine
December has the least sunshine of the year, with an average of 0.7h of sunshine.UV index
January through April, October through 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 hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Posio?
What is the average humidity in December in Posio?
How many days does it rain in December in Posio?
What is the snowiest month in Posio?
How much does it snow in Posio in December?
What is the month with the shortest days in Posio?
How many hours of daylight does Posio have in December?
When are sunrise and sunset in December in Posio?
What is the month with the least sunshine in Posio?
How long on average sun shines in December in Posio?
What are the months with the lowest UV index in Posio?
What is the UV index intensity in December in Posio?
Average temperature in December
Posio, Finland
- Average high temperature in December: -5.6°C
The warmest month (with the highest average high temperature) is July (19.2°C).
The month with the lowest average high temperature is January (-8.4°C).
- Average low temperature in December: -9.5°C
The month with the highest average low temperature is July (10.3°C).
The coldest month (with the lowest average low temperature) is January (-13.8°C).
Average pressure in December
Posio, Finland
- Average pressure in December: 1006.1mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1006.1mbar).
Average wind speed in December
Posio, Finland
- Average wind speed in December: 12.7km/h
The windiest month (with the highest average wind speed) is November (12.9km/h).
The calmest month (with the lowest average wind speed) is July (10.5km/h).
Average humidity in December
Posio, Finland
- Average humidity in December: 96%
The month with the highest relative humidity is January (97%).
The month with the lowest relative humidity is June (70%).
Average rainfall in December
Posio, Finland
- Average rainfall in December: 37mm
The wettest month (with the highest rainfall) is July (57mm).
The driest months (with the least rainfall) are January and April (31mm).
Average rainfall days in December
Posio, Finland
- Average rainfall days in December: 2.8 days
The month with the highest number of rainy days is August (18.4 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in December
Posio, Finland
- Average snowfall in December: 283mm
The month with the highest snowfall is December (283mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in December
Posio, Finland
- Average snowfall days in December: 24.5 days
The month with the highest number of snowfall days is December (24.5 days).
The month with the least snowfall days is July (0 days).
Average daylight in December /
Average sunshine in December
Posio, Finland
- Average daylight in December: 3h and 1min
The month with the longest days is July (Average daylight: 20h and 18min).
The month with the shortest days is December (Average daylight: 3h and 6min).
- Average sunshine in December: 0h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 0h and 42min).
Average sunshine days in December
Posio, Finland
- Average sunshine days in December: 6.3 days
The month with the most sunshine days is July (11.6 days).
The month with the least sunshine days is April (5.3 days).
Average UV index in December
Posio, Finland
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in December
Posio, Finland
- Average cloud cover in December: 84
The month with the most cloud cover is February (Cloud cover 85).
The month with the least cloud cover is July (Cloud cover 51).
Average visibility in December
Posio, Finland
- Average visibility in December: 5km
The months with the highest visibility are June and July (9km).
The months with the lowest visibility are January, February, March, April and December (5km).
