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
Lahti observes a small decrease in the average high-temperature with the arrival of December, falling from November's icy 2.3°C (36.1°F) to a freezing cold -1.4°C (29.5°F). Lahti logs an average low-temperature of -5.1°C (22.8°F) during the nights of December, subtly lower than its daytime highs.Humidity
The average relative humidity in December is 94%.Rainfall
In Lahti, during December, the rain falls for 8.2 days and regularly aggregates up to 40mm (1.57") of precipitation. In Lahti, Finland, during the entire year, the rain falls for 118.7 days and collects up to 398mm (15.67") of precipitation.Snowfall
January through May, September through December are months with snowfall in Lahti. In December, in Lahti, it is snowing for 18.9 days. Throughout December, 189mm (7.44") of snow is accumulated. In Lahti, during the entire year, snow falls for 93.7 days and aggregates up to 918mm (36.14") of snow.Daylight
The month with the shortest days is December, with an average of 5h and 42min of daylight.On the first day of December in Lahti, sunrise is at 09:01 and sunset at 15:11. On the last day of the month, sunrise is at 09:29 and sunset at 15:11 EET.
Sunshine
The month with the least sunshine is December, with an average of 1.4h of sunshine.UV index
The months with the lowest UV index in Lahti 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 minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 1 in December transforms into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
How cold is December in Lahti?
What is the average humidity in December in Lahti?
How much does it rain in Lahti in December?
How many days does it snow in December in Lahti?
What is the month with the shortest days in Lahti?
What is the average length of the day in December in Lahti?
When is the sunrise / sunset in December in Lahti?
What is the month with the least sunshine in Lahti?
How many hours of sunshine does Lahti have in December?
What are the months with the lowest UV index in Lahti?
What is the UV index reading in December in Lahti?
Average temperature in December
Lahti, Finland
- Average high temperature in December: -1.4°C
The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (-4.5°C).
- Average low temperature in December: -5.1°C
The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is January (-8.9°C).
Average pressure in December
Lahti, Finland
- Average pressure in December: 1008.4mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).
Average wind speed in December
Lahti, 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 (9.4km/h).
Average humidity in December
Lahti, Finland
- Average humidity in December: 94%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (67%).
Average rainfall in December
Lahti, Finland
- Average rainfall in December: 40mm
The wettest month (with the highest rainfall) is July (46mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in December
Lahti, Finland
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in December
Lahti, Finland
- Average snowfall in December: 189mm
The month with the highest snowfall is January (196mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in December
Lahti, Finland
- Average snowfall days in December: 18.9 days
The months with the highest number of snowfall days are January and December (18.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Lahti, 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 36min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in December
Lahti, Finland
- Average sunshine days in December: 8.4 days
The months with the most sunshine days are May and August (17.6 days).
The month with the least sunshine days is December (8.4 days).
Average UV index in December
Lahti, 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
Lahti, Finland
- Average cloud cover in December: 80
The months with the most cloud cover are January and February (Cloud cover 81).
The month with the least cloud cover is August (Cloud cover 44).
Average visibility in December
Lahti, Finland
- Average visibility in December: 6km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (5km).
Lahti, Finland
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