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
As November shifts into December, a minor alteration in temperatures is observed, with average highs reducing from a wintry 4.3°C (39.7°F) to a still icy 0.8°C (33.4°F). In December, Ruonala experiences a marginal drop in temperature, with averages of -2.2°C (28°F) at night.Humidity
In December, the average relative humidity is 87%.Rainfall
In Ruonala, in December, during 10.4 rainfall days, 55mm (2.17") of precipitation is typically accumulated. Throughout the year, there are 158.3 rainfall days, and 571mm (22.48") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Ruonala, during December, snow falls for 15.7 days and regularly aggregates up to 141mm (5.55") of snow. In Ruonala, during the entire year, snow falls for 85.1 days and aggregates up to 670mm (26.38") of snow.Daylight
The month with the shortest days is December, with an average of 5h and 54min of daylight.On the first day of December in Ruonala, sunrise is at 08:52 and sunset at 15:11. On the last day of the month, sunrise is at 09:19 and sunset at 15:12 EET.
Sunshine
December has the least sunshine of the year, with an average of 1.6h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 1 in December suggests the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. 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 is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Ruonala have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Ruonala have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Ruonala, Finland
- Average high temperature in December: 0.8°C
The warmest month (with the highest average high temperature) is July (19.7°C).
The month with the lowest average high temperature is February (-2.7°C).
- Average low temperature in December: -2.2°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 (-6.3°C).
Average pressure in December
Ruonala, Finland
- Average pressure in December: 1008.9mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1008.9mbar).
Average wind speed in December
Ruonala, Finland
- Average wind speed in December: 23.7km/h
The windiest month (with the highest average wind speed) is December (23.7km/h).
The calmest month (with the lowest average wind speed) is July (15.5km/h).
Average humidity in December
Ruonala, Finland
- Average humidity in December: 87%
The month with the highest relative humidity is February (92%).
The month with the lowest relative humidity is May (73%).
Average rainfall in December
Ruonala, Finland
- Average rainfall in December: 55mm
The wettest month (with the highest rainfall) is August (67mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in December
Ruonala, Finland
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is October (17.6 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in December
Ruonala, Finland
- Average snowfall in December: 141mm
The month with the highest snowfall is January (148mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Ruonala, Finland
- Average snowfall days in December: 15.7 days
The month with the highest number of snowfall days is January (18.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ruonala, Finland
- Average daylight in December: 5h and 5min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in December: 1h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).
Average sunshine days in December
Ruonala, Finland
- Average sunshine days in December: 6.4 days
The month with the most sunshine days is May (15.2 days).
The month with the least sunshine days is December (6.4 days).
Average UV index in December
Ruonala, 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
Ruonala, Finland
- Average cloud cover in December: 77
The months with the most cloud cover are January and December (Cloud cover 77).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Ruonala, Finland
- Average visibility in December: 8km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March and December (8km).
