See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:18
Sunrise
18:54
Sunset
Moon
Waxing Gibbous
18:34
Moonrise
05:15
Moonset
Daily Forecast
Today
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Air Quality Data Available
Upgrade to access real-time air quality data for Sarpsborg.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Sarpsborg.
View stargazing scoreWeather in Sarpsborg today, September 25, 2026
Expect reduced visibility in Sarpsborg on September 25, 2026 where fog patches form. Allow more time for morning journeys if the air stays thick. Expect a grey start, with morning cloud around 100% by 10:00. Outdoor plans early on should not rely on bright skies.
The temperature range runs from about 11°C up to 16°C. The air stays humid, with relative humidity between 83% and 97% and the peak around 09:00. Winds stay light, near 3.4 km/h by 14:00, so the day feels still more than breezy.
Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 19.3 km on average, though it can drop toward 0.5 km in thicker cloud or showers. The sun rises at 07:18 and sets at 18:54, for a total of 11 hours 35 minutes of sunlight today.
Taken together, murky spells in Sarpsborg on September 25, 2026 favour slower morning movement before any clearer air arrives.
Frequently asked questions about weather in Sarpsborg
How warm does it get in Sarpsborg?
The warmest month in Sarpsborg is July, with average high temperatures of 22°C. The average temperature during this period is around 18°C.
How cold does it get in Sarpsborg?
The coldest month in Sarpsborg is January, with average low temperatures of -3°C. The average temperature during this period is around 0°C.
What is the wettest time of year in Sarpsborg?
The wettest month in Sarpsborg is September, with an average of 96mm of precipitation.
What is the driest time of year in Sarpsborg?
The driest month in Sarpsborg is April, with an average of 45mm of precipitation.
