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
December indicates a minor shift in the average high-temperature, from November's icy 3.8°C (38.8°F) to a still cold 0.3°C (32.5°F). December's average low temperature in Harjavalta is a freezing cold -2.5°C (27.5°F), displaying a subtle drop from its daily peak.Humidity
In December, the average relative humidity is 89%.Rainfall
In Harjavalta, during December, the rain falls for 11.5 days and regularly aggregates up to 51mm (2.01") of precipitation. In Harjavalta, Finland, during the entire year, the rain falls for 154.3 days and collects up to 508mm (20") of precipitation.Snowfall
January through May, October through December are months with snowfall. In Harjavalta, in December, snow falls for 15.9 days, with typically accumulated 142mm (5.59") of snow. Throughout the year, there are 82.2 snowfall days, and 699mm (27.52") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 5h and 36min of daylight.On the first day of December in Harjavalta, sunrise is at 09:18 and sunset at 15:22. On the last day of the month, sunrise is at 09:46 and sunset at 15:22 EET.
Sunshine
The month with the least sunshine is December, with an average of 2h of sunshine.UV index
The months with the lowest UV index in Harjavalta are January through March and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How cold is December in Harjavalta?
What is the average humidity in December in Harjavalta?
How many days does it rain in December in Harjavalta?
How much does it snow in Harjavalta in December?
What is the month with the shortest days in Harjavalta?
How many hours of daylight does Harjavalta have in December?
When are sunrise and sunset in December in Harjavalta?
What is the month with the least sunshine in Harjavalta?
How many hours of sunshine does Harjavalta have in December?
What are the months with the lowest UV index in Harjavalta?
How high is the UV index in December in Harjavalta?
Average temperature in December
Harjavalta, Finland
- Average high temperature in December: 0.3°C
The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is January (-2.3°C).
- Average low temperature in December: -2.5°C
The month with the highest average low temperature is July (13.4°C).
The coldest month (with the lowest average low temperature) is January (-6°C).
Average pressure in December
Harjavalta, Finland
- Average pressure in December: 1006.8mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1006.8mbar).
Average wind speed in December
Harjavalta, Finland
- Average wind speed in December: 16.6km/h
The windiest month (with the highest average wind speed) is December (16.6km/h).
The calmest month (with the lowest average wind speed) is July (12.6km/h).
Average humidity in December
Harjavalta, Finland
- Average humidity in December: 89%
The month with the highest relative humidity is February (92%).
The month with the lowest relative humidity is May (69%).
Average rainfall in December
Harjavalta, Finland
- Average rainfall in December: 51mm
The wettest month (with the highest rainfall) is July (63mm).
The driest months (with the least rainfall) are March and April (31mm).
Average rainfall days in December
Harjavalta, Finland
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Harjavalta, Finland
- Average snowfall in December: 142mm
The month with the highest snowfall is February (163mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Harjavalta, Finland
- Average snowfall days in December: 15.9 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harjavalta, Finland
- Average daylight in December: 5h and 4min
The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 36min).
- Average sunshine in December: 2h and 0min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in December
Harjavalta, Finland
- Average sunshine days in December: 8.7 days
The month with the most sunshine days is May (14.2 days).
The month with the least sunshine days is November (8.5 days).
Average UV index in December
Harjavalta, 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 and December (UV index 1).
Average cloud cover in December
Harjavalta, Finland
- Average cloud cover in December: 71
The months with the most cloud cover are January, February and December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in December
Harjavalta, Finland
- Average visibility in December: 8km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (7km).
Harjavalta, Finland
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