Tromsø Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Tromsø. The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.

Tromsø has a notably wet climate with abundant precipitation, recording 1358 mm of rain/snowfall per year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

Precipitation levels in Tromsø remain relatively steady throughout the year. September has the most rain, with 141 mm over 21 days. In April, this drops slightly to 97 mm, making the city's climate fairly predictable.

September, the city’s wettest month, has a maximum daytime temperature of 12°C. During the driest month April you can expect a temperature of 4°C. For more detailed insights into the city’s temperatures, visit our Tromsø Temperature page.

Annual Precipitation in Norway

The map below shows the annual precipitation across Norway. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Tromsø’s average annual precipitation is 1358 mm. Let’s compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm, spread fairly evenly throughout the year.

In Seoul, South Korea, the average annual precipitation is 1237 mm, with most rain falling during the summer monsoon season.

Adelaide, Australia, enjoys 511 mm of annual precipitation, with dry summers and wet winters.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm of annual rainfall, with the heaviest precipitation occurring during September and October.

How is Precipitation Measured?

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Interesting weather facts

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

For more detailed information about Tromsø’s weather, including sunshine hours, humidity levels, and temperature data, visit our Tromsø Climate page.