December weather forecastIsojoki, Finland
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Isojoki, Finland, with an average temperature varying between -5°C (23°F) and -1.5°C (29.3°F).Temperature
Isojoki's December weather shows a modest shift in high-temperatures, falling from November's cold 2.5°C (36.5°F) to a subzero cold -1.5°C (29.3°F). An average temperature of -5°C (23°F) is logged during the nights of December in Isojoki, a small step down from daytime highs.Humidity
In December, the average relative humidity in Isojoki is 93%.Rainfall
In Isojoki, in December, it is raining for 8 days, with typically 47mm (1.85") of accumulated precipitation. Throughout the year, there are 144.9 rainfall days, and 493mm (19.41") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 20.3 days and accumulates 234mm (9.21") of snow.Daylight
December has the shortest days of the year in Isojoki, with an average of 5h and 18min of daylight.On the first day of December, sunrise is at 09:27 and sunset at 15:15. On the last day of the month, sunrise is at 09:56 and sunset at 15:14 EET.
Sunshine
The months with the least sunshine are January and December, with an average of 1.8h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Isojoki. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Isojoki, Finland
- Average high temperature in December: -1.5°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 (-4.3°C).
- Average low temperature in December: -5°C
The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure in December
Isojoki, Finland
- Average pressure in December: 1006.8mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1006.8mbar).
Average wind speed in December
Isojoki, Finland
- Average wind speed in December: 13.1km/h
The windiest month (with the highest average wind speed) is December (13.1km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).
Average humidity in December
Isojoki, Finland
- Average humidity in December: 93%
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is May (67%).
Average rainfall in December
Isojoki, Finland
- Average rainfall in December: 47mm
The wettest month (with the highest rainfall) is July (54mm).
The driest months (with the least rainfall) are April and September (34mm).
Average rainfall days in December
Isojoki, Finland
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in December
Isojoki, Finland
- Average snowfall in December: 234mm
The month with the highest snowfall is December (234mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Isojoki, Finland
- Average snowfall days in December: 20.3 days
The month with the highest number of snowfall days is January (20.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Isojoki, Finland
- Average daylight in December: 5h and 18min
The month with the longest days is June (Average daylight: 19h and 36min).
The month with the shortest days is December (Average daylight: 5h and 18min).
- Average sunshine in December: 1h and 48min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 1h and 48min).
Average sunshine days in December
Isojoki, Finland
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is May (14.4 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in December
Isojoki, 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
Isojoki, Finland
- Average cloud cover in December: 74
The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are June and July (Cloud cover 44).
Average visibility in December
Isojoki, Finland
- Average visibility in December: 7km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (6km).
