Climate Insights for Ulefoss

The climate in Ulefoss is cool. The average annual temperature is 6°C and approximately 1156mm of precipitation falls per year. Ulefoss receives a notable amount of rainfall throughout the year, including during its driest month. Ulefoss 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 -5°C. Ulefoss experiences heavy snowfall, typically from January through December.

Temperatures in Ulefoss vary considerably across the year, with a 25°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 -5°C and the daily average is -3°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between April and May, with a 6°C shift in average temperatures.

Ulefoss is a moderately rainy area, receiving approximately 1156mm of precipitation annually, which averages out to around 96mm per month. The wettest month is September, averaging 139mm of rainfall. November and August also tend to see above-average precipitation. The driest month is April, with just 50mm. That's 89mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Ulefoss receives heavy snowfall, accumulating around 211cm annually from January through December. The snowiest month is January, with approximately 49cm. Winter travel should account for significant snow cover.

Ulefoss is mildly breezy, with an average annual wind speed of 13km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently spring in Ulefoss, which began on March 20, 2026. Ulefoss 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 -5°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Ulefoss is during June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 94mm per month. By contrast, July can be uncomfortably hot with highs reaching 20°C, while January is the coldest period with lows dropping to -5°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 Ulefoss 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.