Climate Overview
The climate in Kongsberg is cool. The average annual temperature is 6°C and approximately 1248mm of precipitation falls per year. Kongsberg receives a notable amount of rainfall throughout the year, including during its driest month. Kongsberg is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to -6°C. Kongsberg experiences heavy snowfall, typically from January through December.
Temperature
Temperatures in Kongsberg vary considerably across the year, with a 26°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 20°C with a mean of 16°C. The coldest month is January, when overnight lows fall to -6°C and the daily average is -4°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.
Precipitation
Kongsberg is a fairly wet location, receiving approximately 1248mm of precipitation annually, which averages out to around 104mm per month. The wettest month is October, averaging 131mm of rainfall. November and September also tend to see above-average precipitation. The driest month is April, with just 63mm. That's 68mm less than October, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Kongsberg receives heavy snowfall, accumulating around 376cm annually from January through December. The snowiest month is December, with approximately 81cm. Winter travel should account for significant snow cover.
Wind
Kongsberg is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
93 days until Autumn
It is currently summer in Kongsberg, which began on June 21, 2026. Kongsberg is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 20°C, while the coldest stretch bottoms out in January near -6°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from -4 to 15°C. Precipitation is moderate at around 220mm for the season, averaging 73mm per month. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 10 to 20°C. Rainfall is heavy, totalling around 344mm across the season with a monthly average of 115mm. Winds are generally light, averaging 2km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -2 to 15°C. Rainfall is heavy, totalling around 383mm across the season with a monthly average of 128mm. Expect around 67cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -6 to 1°C. Precipitation is moderate at around 301mm for the season, averaging 100mm per month. Expect around 219cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Kongsberg based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
