Sarpsborg Temperature by Month

Sarpsborg in Østfold, Norway sees significant seasonal temperature differences, with daytime highs between 3°C (37°F) in January and 23°C (73°F) in July, averaging 12°C (54°F) annually. Explore the full monthly breakdown below.

Depending on the time of the year, temperatures range from comfortable to cold in Sarpsborg. At night, minimum temperatures range from 13°C (55°F) in July to -4°C (25°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Sarpsborg by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. July, the city's warmest month, averages 238 hours of sunshine.

The chart below shows the average temperature throughout the year:

Sarpsborg's average annual maximum temperature is 12°C (54°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Sarpsborg, January is the coolest month, with average highs of 3°C (37°F) and humidity around 83%, considered very high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Sarpsborg this rarely lasts long on the ground.

For more on Sarpsborg's weather, including monthly rainfall, sunshine hours, and humidity, visit our Sarpsborg climate page.