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
A moderate decline in average high-temperatures is noted in December, moving from a wintry 2.5°C (36.5°F) in November to a freezing cold -1.2°C (29.8°F). December records a small disparity from daytime temperatures, marking an average low-temperature of -4.6°C (23.7°F) in Iitti.Humidity
The average relative humidity in December in Iitti is 93%.Rainfall
In Iitti, in December, during 8.5 rainfall days, 46mm (1.81") of precipitation is typically accumulated. Throughout the year, in Iitti, there are 131.9 rainfall days, and 451mm (17.76") of precipitation is accumulated.Snowfall
Months with snowfall in Iitti, Finland, are January through May, October through December. In Iitti, Finland, in December, snow falls for 21.2 days, with typically accumulated 224mm (8.82") of snow. Throughout the year, there are 104.4 snowfall days, and 1093mm (43.03") of snow is accumulated.Daylight
With an average of 5h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 08:58 and sunset at 15:09. On the last day of December, sunrise is at 09:25 and sunset at 15:10 EET.
Sunshine
December has the least sunshine of the year in Iitti, with an average of 1.2h of sunshine.UV index
The months with the lowest UV index in Iitti, Finland, are January through March, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Iitti in December?
What is the average humidity in December in Iitti?
How much does it rain in Iitti in December?
How many days does it snow in December in Iitti?
What is the month with the shortest days in Iitti?
What is the average length of the day in December in Iitti?
When is the sunrise / sunset in December in Iitti?
What is the month with the least sunshine in Iitti?
How many hours of sunshine does Iitti have in December?
What is the month with the lowest UV index in Iitti?
How high is the UV index in December in Iitti?
Average temperature in December
Iitti, Finland
- Average high temperature in December: -1.2°C
The warmest month (with the highest average high temperature) is July (21.6°C).
The month with the lowest average high temperature is January (-4.3°C).
- Average low temperature in December: -4.6°C
The month with the highest average low temperature is July (13°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure in December
Iitti, 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
Iitti, Finland
- Average wind speed in December: 13.8km/h
The windiest month (with the highest average wind speed) is December (13.8km/h).
The calmest month (with the lowest average wind speed) is August (10.7km/h).
Average humidity in December
Iitti, Finland
- Average humidity in December: 93%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (68%).
Average rainfall in December
Iitti, Finland
- Average rainfall in December: 46mm
The wettest month (with the highest rainfall) is July (51mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in December
Iitti, Finland
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in December
Iitti, Finland
- Average snowfall in December: 224mm
The month with the highest snowfall is February (231mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Iitti, Finland
- Average snowfall days in December: 21.2 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Iitti, Finland
- Average daylight in December: 5h and 5min
The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 48min).
- Average sunshine in December: 1h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 1h and 12min).
Average sunshine days in December
Iitti, Finland
- Average sunshine days in December: 5.5 days
The month with the most sunshine days is May (17.3 days).
The month with the least sunshine days is December (5.5 days).
Average UV index in December
Iitti, Finland
- Average UV index in December: 1
The months with the highest UV index are June and 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
Iitti, Finland
- Average cloud cover in December: 79
The months with the most cloud cover are January and February (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in December
Iitti, Finland
- Average visibility in December: 7km
The months with the highest visibility are May, June, July, August and September (9km).
The months with the lowest visibility are January, February and March (6km).
