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
The arrival of December corresponds with a minor reduction in the average high-temperature, down from November's cold 2.3°C (36.1°F) to a subzero cold -1.5°C (29.3°F). Nighttime in Hämeenlinna, during December, brings an average low of -4.8°C (23.4°F), a modest reduction from the day's peak.Humidity
The average relative humidity in December is 93%.Rainfall
In Hämeenlinna, in December, it is raining for 7.1 days, with typically 34mm (1.34") of accumulated precipitation. Throughout the year, there are 129.3 rainfall days, and 403mm (15.87") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 16.5 days. Throughout December, 143mm (5.63") of snow is accumulated. In Hämeenlinna, during the entire year, snow falls for 90.6 days and aggregates up to 766mm (30.16") of snow.Daylight
December has the shortest days of the year, with an average of 5h and 42min of daylight.On the first day of the month, sunrise is at 09:06 and sunset at 15:16. On the last day of December, in Hämeenlinna, sunrise is at 09:34 and sunset at 15:16 EET.
Sunshine
The month with the least sunshine in Hämeenlinna, Finland, is December, with an average of 1.4h 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 minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Hämeenlinna in December?
What is the average humidity in December in Hämeenlinna?
How much does it rain in Hämeenlinna in December?
How many days does it snow in December in Hämeenlinna?
What is the month with the shortest days in Hämeenlinna?
What is the average length of the day in December in Hämeenlinna?
When are sunrise and sunset in December in Hämeenlinna?
What is the month with the least sunshine in Hämeenlinna?
How long on average sun shines in December in Hämeenlinna?
What are the months with the lowest UV index in Hämeenlinna?
How high is the UV index in December in Hämeenlinna?
Average temperature in December
Hämeenlinna, Finland
- Average high temperature in December: -1.5°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (-4.4°C).
- Average low temperature in December: -4.8°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is January (-8.5°C).
Average pressure in December
Hämeenlinna, Finland
- Average pressure in December: 1008mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in December
Hämeenlinna, Finland
- Average wind speed in December: 12km/h
The windiest month (with the highest average wind speed) is December (12km/h).
The calmest month (with the lowest average wind speed) is August (9.6km/h).
Average humidity in December
Hämeenlinna, 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 (66%).
Average rainfall in December
Hämeenlinna, Finland
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is July (54mm).
The driest months (with the least rainfall) are March and April (25mm).
Average rainfall days in December
Hämeenlinna, Finland
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Hämeenlinna, Finland
- Average snowfall in December: 143mm
The month with the highest snowfall is January (157mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Hämeenlinna, Finland
- Average snowfall days in December: 16.5 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Hämeenlinna, Finland
- Average daylight in December: 5h and 4min
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 42min).
- Average sunshine in December: 1h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in December
Hämeenlinna, Finland
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is May (15.9 days).
The month with the least sunshine days is March (9.4 days).
Average UV index in December
Hämeenlinna, Finland
- Average UV index in December: 1
The month with the highest UV index is 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
Hämeenlinna, Finland
- Average cloud cover in December: 78
The months with the most cloud cover are January and February (Cloud cover 80).
The months with the least cloud cover are May, June, July and August (Cloud cover 47).
Average visibility in December
Hämeenlinna, Finland
- Average visibility in December: 6km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January and February (5km).
Hämeenlinna, Finland
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