December weather forecastRunnaby, Sweden
December
Weather in December
December, the first month of the winter in Runnaby, is also a wintry month, with an average temperature ranging between min -2.6°C (27.3°F) and max 0.7°C (33.3°F).Temperature
The advent of December brings a subtle shift in temperature, with the average high moving from an icy 4.2°C (39.6°F) in November to a still cold 0.7°C (33.3°F). Runnaby observes a minimal variance in temperature, with a consistent average low of -2.6°C (27.3°F) during the nights of December.Humidity
In Runnaby, the average relative humidity in December is 90%.Rainfall
In Runnaby, during December, the rain falls for 7.2 days and regularly aggregates up to 12mm (0.47") of precipitation. In Runnaby, during the entire year, the rain falls for 104.5 days and collects up to 149mm (5.87") of precipitation.Snowfall
Months with snowfall in Runnaby are January through May, October through December. In Runnaby, in December, snow falls for 10.3 days, with typically accumulated 27mm (1.06") of snow. In Runnaby, during the entire year, snow falls for 48.1 days and aggregates up to 162mm (6.38") of snow.Daylight
The month with the shortest days is December, with an average of 6h and 18min of daylight.On the first day of the month, sunrise is at 08:29 and sunset at 15:07. On the last day of December, sunrise is at 08:55 and sunset at 15:10 CET.
Sunshine
In December, the average sunshine in Runnaby is 3.1h.UV index
The average daily maximum UV index in December in Runnaby is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Runnaby, Sweden
- Average high temperature in December: 0.7°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (-1.1°C).
- Average low temperature in December: -2.6°C
The month with the highest average low temperature is July (12.3°C).
The coldest months (with the lowest average low temperature) are January and February (-4.5°C).
Average pressure in December
Runnaby, Sweden
- Average pressure in December: 1008.1mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008.1mbar).
Average wind speed in December
Runnaby, Sweden
- Average wind speed in December: 12.8km/h
The windiest month (with the highest average wind speed) is December (12.8km/h).
The calmest month (with the lowest average wind speed) is August (10.6km/h).
Average humidity in December
Runnaby, Sweden
- Average humidity in December: 90%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (69%).
Average rainfall in December
Runnaby, Sweden
- Average rainfall in December: 12mm
The wettest month (with the highest rainfall) is July (20mm).
The driest month (with the least rainfall) is April (6mm).
Average rainfall days in December
Runnaby, Sweden
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is July (13.6 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in December
Runnaby, Sweden
- Average snowfall in December: 27mm
The month with the highest snowfall is March (39mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Runnaby, Sweden
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is February (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Runnaby, Sweden
- Average daylight in December: 6h and 18min
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 18min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in December
Runnaby, Sweden
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is March (19 days).
The months with the least sunshine days are February and December (15.4 days).
Average UV index in December
Runnaby, Sweden
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Runnaby, Sweden
- Average cloud cover in December: 67
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is June (Cloud cover 43).
Average visibility in December
Runnaby, Sweden
- Average visibility in December: 8km
The months with the highest visibility are April, May, June, July and August (9km).
The months with the lowest visibility are January and February (7km).
