Tromsø Temperature by Month

Tromsø in Troms, Norway sees significant seasonal temperature differences, with daytime highs between -3°C (27°F) in January and 17°C (63°F) in July, averaging 6°C (43°F) annually. Explore the full monthly breakdown below.

Depending on the time of the year, temperatures range from mild to very cold in Tromsø. Nighttime lows follow the same pattern, ranging from 9°C (48°F) to -10°C (14°F).

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

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. July, the city's warmest month, sees 205 hours of sunshine.

The chart below shows the average temperature throughout the year:

Tromsø's average annual maximum temperature is 6°C (43°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.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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.

Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.

Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.

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