Climate Insights for Slagelse

The climate in Slagelse is cool. The average annual temperature is 10°C and approximately 762mm of precipitation falls per year. Slagelse receives a notable amount of rainfall throughout the year, including during its driest month. Slagelse is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are February, January, March, when temperatures can drop to 1°C. Light snow can occur between January and December.

Slagelse sees moderate temperature variation throughout the year, ranging from 1°C to 20°C. August is the warmest month, though highs remain moderate at 20°C with a mean of 18°C. February is the coolest month, with minimum temperatures around 1°C and an average of 3°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.

Slagelse is a relatively dry area, receiving approximately 762mm of precipitation annually, which averages out to around 63mm per month. The wettest month is October, averaging 85mm of rainfall. July and August also tend to see above-average precipitation. The driest month is April, with just 45mm. That's 40mm 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. Light snowfall can occur between January and December, totalling around 29cm annually. January is the snowiest month with approximately 10cm.

Slagelse is moderately windy, with an average annual wind speed of 20km/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 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 18km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h 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 23km/h in winter, 19km/h in spring, 18km/h in summer, 21km/h in autumn.

It is currently summer in Slagelse, which began on June 21, 2026. Slagelse 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 August at around 20°C, while the coldest stretch bottoms out in February near 1°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Slagelse is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 72mm per month. By contrast, February can be quite cold with temperatures dropping to 1°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Slagelse 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.