December weather forecastJänhijoki, Finland
December
Weather in December
December, the first month of the winter in Jänhijoki, is still a freezing cold month, with temperature in the range of an average low of -4.5°C (23.9°F) and an average high of -1°C (30.2°F).Temperature
The onset of December aligns with a soft reduction in the average high-temperature, gently falling from an icy 2.7°C (36.9°F) in November to a subzero cold -1°C (30.2°F). Jänhijoki, during December nights, witnesses an average temperature marginally cooler than its daytime highs, at a still freezing cold -4.5°C (23.9°F).Humidity
In Jänhijoki, the average relative humidity in December is 93%.Rainfall
In Jänhijoki, in December, it is raining for 7.4 days, with typically 35mm (1.38") of accumulated precipitation. Throughout the year, in Jänhijoki, there are 128.2 rainfall days, and 406mm (15.98") of precipitation is accumulated.Snowfall
Months with snowfall in Jänhijoki, Finland, are January through May, October through December. In December, it is snowing for 15.8 days. Throughout December, 147mm (5.79") of snow is accumulated. Throughout the year, in Jänhijoki, there are 82.5 snowfall days, and 750mm (29.53") of snow is accumulated.Daylight
With an average of 5h and 48min of daylight, December has the shortest days of the year in Jänhijoki.On the first day of the month, sunrise is at 09:09 and sunset at 15:21. On the last day of December, in Jänhijoki, sunrise is at 09:36 and sunset at 15:21 EET.
Sunshine
The month with the least sunshine is December, with an average of 1.7h 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. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Jänhijoki, Finland
- Average high temperature in December: -1°C
The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-4°C).
- Average low temperature in December: -4.5°C
The month with the highest average low temperature is July (12.2°C).
The coldest month (with the lowest average low temperature) is January (-8.1°C).
Average pressure in December
Jänhijoki, Finland
- Average pressure in December: 1007.8mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in December
Jänhijoki, Finland
- Average wind speed in December: 14.2km/h
The windiest month (with the highest average wind speed) is December (14.2km/h).
The calmest month (with the lowest average wind speed) is August (10.8km/h).
Average humidity in December
Jänhijoki, Finland
- Average humidity in December: 93%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is May (68%).
Average rainfall in December
Jänhijoki, Finland
- Average rainfall in December: 35mm
The wettest month (with the highest rainfall) is July (54mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in December
Jänhijoki, Finland
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Jänhijoki, Finland
- Average snowfall in December: 147mm
The month with the highest snowfall is February (165mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Jänhijoki, Finland
- Average snowfall days in December: 15.8 days
The month with the highest number of snowfall days is February (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
Jänhijoki, Finland
- Average daylight in December: 5h and 48min
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 42min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in December
Jänhijoki, Finland
- Average sunshine days in December: 11 days
The month with the most sunshine days is May (15.1 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in December
Jänhijoki, 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
Jänhijoki, Finland
- Average cloud cover in December: 75
The month with the most cloud cover is February (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in December
Jänhijoki, Finland
- Average visibility in December: 7km
The months with the highest visibility are May, June, July and August (9km).
The month with the lowest visibility is February (6km).
