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 shift from November to December includes a small decrease in the average high-temperature, from an icy 1.2°C (34.2°F) to a freezing cold -2.9°C (26.8°F). During the nights of December, Petruma maintains an almost steady temperature with an average low of -6.1°C (21°F).Humidity
In Petruma, the average relative humidity in December is 93%.Rainfall
In December, the rain falls for 4.4 days. Throughout December, 35mm (1.38") of precipitation is accumulated. In Petruma, during the entire year, the rain falls for 127.8 days and collects up to 468mm (18.43") of precipitation.Snowfall
January through June, September through December are months with snowfall in Petruma. In December, in Petruma, it is snowing for 22.3 days. Throughout December, 199mm (7.83") of snow is accumulated. In Petruma, Finland, during the entire year, snow falls for 120.8 days and aggregates up to 1095mm (43.11") of snow.Daylight
The month with the shortest days is December, with an average of 5h and 12min of daylight.On the first day of December, sunrise is at 09:04 and sunset at 14:43. On the last day of the month, sunrise is at 09:33 and sunset at 14:42 EET.
Sunshine
With an average of 0.6h of sunshine, December has the least sunshine of the year.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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: During December, 1 as the daily maximum UV index converts into the following advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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 Petruma in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine in Petruma?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December in Petruma?
Average temperature in December
Petruma, Finland
- Average high temperature in December: -2.9°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (-6.4°C).
- Average low temperature in December: -6.1°C
The month with the highest average low temperature is July (12.5°C).
The coldest month (with the lowest average low temperature) is January (-10.4°C).
Average pressure in December
Petruma, Finland
- Average pressure in December: 1008.6mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1008.6mbar).
Average wind speed in December
Petruma, Finland
- Average wind speed in December: 13.8km/h
The windiest months (with the highest average wind speed) are November and December (13.8km/h).
The calmest month (with the lowest average wind speed) is July (10.2km/h).
Average humidity in December
Petruma, Finland
- Average humidity in December: 93%
The month with the highest relative humidity is February (96%).
The months with the lowest relative humidity are May and June (68%).
Average rainfall in December
Petruma, Finland
- Average rainfall in December: 35mm
The wettest month (with the highest rainfall) is July (66mm).
The driest month (with the least rainfall) is April (26mm).
Average rainfall days in December
Petruma, Finland
- Average rainfall days in December: 4.4 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
Petruma, Finland
- Average snowfall in December: 199mm
The month with the highest snowfall is March (202mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in December
Petruma, Finland
- Average snowfall days in December: 22.3 days
The month with the highest number of snowfall days is December (22.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Petruma, Finland
- Average daylight in December: 5h and 1min
The month with the longest days is June (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 5h and 12min).
- Average sunshine in December: 0h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 0h and 36min).
Average sunshine days in December
Petruma, Finland
- Average sunshine days in December: 8.6 days
The month with the most sunshine days is May (15 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in December
Petruma, 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
Petruma, Finland
- Average cloud cover in December: 83
The month with the most cloud cover is February (Cloud cover 84).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in December
Petruma, Finland
- Average visibility in December: 7km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (5km).
