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
December
Weather in December
Temperature
In Karlby, entering December brings a subtle temperature decrement, reducing from November's chilly 6.7°C (44.1°F) to a wintry 3.5°C (38.3°F). Karlby's temperature during December nights registers a minor decrease to an average low of 1.7°C (35.1°F).Humidity
The average relative humidity in December is 81%.Rainfall
In Karlby, during December, the rain falls for 11.8 days and regularly aggregates up to 33mm (1.3") of precipitation. In Karlby, during the entire year, the rain falls for 132.5 days and collects up to 310mm (12.2") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Karlby, in December, during 7.5 snowfall days, 29mm (1.14") of snow is typically accumulated. In Karlby, during the entire year, snow falls for 38.5 days and aggregates up to 160mm (6.3") of snow.Daylight
The month with the shortest days is December, with an average of 6h and 6min of daylight.On the first day of December, sunrise is at 09:11 and sunset at 15:39. On the last day of the month, sunrise is at 09:37 and sunset at 15:41 EET.
Sunshine
With an average of 2h of sunshine, December has the least sunshine of the year.UV index
January through March and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 1 in December transforms into this advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days in Karlby?
How many hours of daylight does Karlby have in December?
What time are sunrise and sunset in December in Karlby?
What is the month with the least sunshine?
How many hours of sunshine does Karlby have in December?
When is the lowest UV index?
What is the UV index intensity in December in Karlby?
Average temperature in December
Karlby, Finland
- Average high temperature in December: 3.5°C
The warmest month (with the highest average high temperature) is August (18.1°C).
The month with the lowest average high temperature is February (0.3°C).
- Average low temperature in December: 1.7°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (-1.7°C).
Average pressure in December
Karlby, Finland
- Average pressure in December: 1007.8mbar
The month with the highest atmospheric pressure is May (1015mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in December
Karlby, Finland
- Average wind speed in December: 34.1km/h
The windiest month (with the highest average wind speed) is December (34.1km/h).
The calmest month (with the lowest average wind speed) is July (21.2km/h).
Average humidity in December
Karlby, Finland
- Average humidity in December: 81%
The months with the highest relative humidity are February and March (84%).
The months with the lowest relative humidity are August, September and October (78%).
Average rainfall in December
Karlby, Finland
- Average rainfall in December: 33mm
The wettest month (with the highest rainfall) is September (38mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in December
Karlby, Finland
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Karlby, Finland
- Average snowfall in December: 29mm
The month with the highest snowfall is January (41mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Karlby, Finland
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Karlby, Finland
- Average daylight in December: 6h and 1min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in December: 2h
The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 2h).
Average sunshine days in December
Karlby, Finland
- Average sunshine days in December: 8.9 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is December (8.9 days).
Average UV index in December
Karlby, 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 and December (UV index 1).
Average cloud cover in December
Karlby, Finland
- Average cloud cover in December: 71
The months with the most cloud cover are January and December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Karlby, Finland
- Average visibility in December: 9km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
