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
The arrival of December correlates with a minor temperature reduction, down from November's 5.5°C (41.9°F) to a still wintry 1.9°C (35.4°F). During December, nights in Keila-Joa cool slightly to an average low of -0.6°C (30.9°F).Humidity
In December, the average relative humidity is 86%.Rainfall
In Keila-Joa, in December, during 13 rainfall days, 46mm (1.81") of precipitation is typically accumulated. In Keila-Joa, during the entire year, the rain falls for 159.9 days and collects up to 528mm (20.79") of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, in Keila-Joa, it is snowing for 13.2 days. Throughout December, 82mm (3.23") of snow is accumulated. Throughout the year, there are 60 snowfall days, and 411mm (16.18") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 6h and 12min of daylight.On the first day of the month, sunrise is at 08:53 and sunset at 15:30. On the last day of December, in Keila-Joa, Estonia, sunrise is at 09:19 and sunset at 15:32 EET.
Sunshine
December has the least sunshine of the year in Keila-Joa, with an average of 1.8h of sunshine.UV index
February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Keila-Joa. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Keila-Joa in December?
What is the average humidity in December in Keila-Joa?
How much does it rain in Keila-Joa in December?
How much does it snow in Keila-Joa in December?
What is the month with the shortest days in Keila-Joa?
What is the average length of the day in December in Keila-Joa?
When is the sunrise / sunset in December in Keila-Joa?
What is the month with the least sunshine in Keila-Joa?
How long on average sun shines in December in Keila-Joa?
What are the months with the lowest UV index in Keila-Joa?
How high is the UV index in December in Keila-Joa?
Average temperature in December
Keila-Joa, Estonia
- Average high temperature in December: 1.9°C
The warmest month (with the highest average high temperature) is July (19.8°C).
The month with the lowest average high temperature is January (-1.2°C).
- Average low temperature in December: -0.6°C
The month with the highest average low temperature is July (15.1°C).
The coldest month (with the lowest average low temperature) is February (-4.1°C).
Average pressure in December
Keila-Joa, Estonia
- Average pressure in December: 1008.9mbar
The month with the highest atmospheric pressure is May (1015.1mbar).
The month with the lowest atmospheric pressure is December (1008.9mbar).
Average wind speed in December
Keila-Joa, Estonia
- Average wind speed in December: 24km/h
The windiest month (with the highest average wind speed) is December (24km/h).
The calmest month (with the lowest average wind speed) is May (15.2km/h).
Average humidity in December
Keila-Joa, Estonia
- Average humidity in December: 86%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are May and August (75%).
Average rainfall in December
Keila-Joa, Estonia
- Average rainfall in December: 46mm
The wettest month (with the highest rainfall) is August (67mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in December
Keila-Joa, Estonia
- Average rainfall days in December: 13 days
The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Keila-Joa, Estonia
- Average snowfall in December: 82mm
The month with the highest snowfall is January (91mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Keila-Joa, Estonia
- Average snowfall days in December: 13.2 days
The month with the highest number of snowfall days is December (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Keila-Joa, Estonia
- Average daylight in December: 6h and 1min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 12min).
- Average sunshine in December: 1h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in December
Keila-Joa, Estonia
- Average sunshine days in December: 6.9 days
The month with the most sunshine days is May (16.6 days).
The month with the least sunshine days is December (6.9 days).
Average UV index in December
Keila-Joa, Estonia
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in December
Keila-Joa, Estonia
- Average cloud cover in December: 77
The month with the most cloud cover is December (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Keila-Joa, Estonia
- Average visibility in December: 9km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, October, November and December (9km).
