Climate Insights for Brønnøysund

The climate in Brønnøysund is cool. The average annual temperature is 6°C and approximately 2076mm of precipitation falls per year. Brønnøysund receives a notable amount of rainfall throughout the year, including during its driest month. Brønnøysund is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -3°C. Brønnøysund experiences heavy snowfall, typically from January through December.

Brønnøysund sees moderate temperature variation throughout the year, ranging from -3°C to 16°C. July is the warmest month, though highs remain moderate at 16°C with a mean of 14°C. The coldest month is January, when overnight lows fall to -3°C and the daily average is -1°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between September and October, with a 5°C shift in average temperatures.

Brønnøysund is a very wet location, receiving approximately 2076mm of precipitation annually, which averages out to around 173mm per month. The wettest month is October, averaging 230mm of rainfall. December and January also tend to see above-average precipitation. The driest month is May, with just 107mm. That's 123mm 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. Brønnøysund receives heavy snowfall, accumulating around 280cm annually from January through December. The snowiest month is January, with approximately 61cm. Winter travel should account for significant snow cover.

Brønnøysund is moderately windy, with an average annual wind speed of 22km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 27km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 10km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 26km/h in winter, 21km/h in spring, 18km/h in summer, 22km/h in autumn.

It is currently spring in Brønnøysund, which began on March 20, 2026. Brønnøysund 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 16°C, while the coldest stretch bottoms out in January near -3°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The table below shows monthly climate averages for Brønnøysund 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.