Harstad Rainfall & Precipitation: Monthly Averages and Year-Round Insights
This page shows both the average monthly rainfall and the number of rainy days in Harstad, Troms, Norway. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let’s explore the details to provide you with a complete overview.
Harstad has a relatively rain/snowy climate with high precipitation levels, averaging 1326 mm of rain/snowfall annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm)
Precipitation levels in Harstad remain relatively steady throughout the year. September has the most rain, with 134 mm over 22 days. In April, this drops slightly to 88 mm, making the city's climate fairly predictable.
September, the wettest month, has a maximum daytime temperature of 12°C. The city receives 92 hours of sunshine in this period. During the driest month April you can expect a temperature of 5°C. For more detailed insights into the city’s temperatures, visit our Harstad 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
Harstad’s average annual precipitation is 1326 mm. Let’s compare this to some popular worldwide tourist destinations:
Chicago, USA, sees an annual precipitation of 1062 mm, with rain and snow contributing to its humid climate.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm of annual rainfall, mostly in the summer.
Adelaide, Australia, enjoys 511 mm of annual precipitation, with dry summers and wet winters.
Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
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
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Harstad’s weather, including sunshine hours, humidity levels, and temperature data, visit our Harstad Climate page.