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

This page shows the average amount of rainfall per month in Helsinki. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

Generally, Helsinki has a moderate amount of precipitation, averaging 736 mm of rain/snowfall annually.

Monthly Precipitation Levels

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

Helsinki offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between July (80 mm) and March (42 mm) is not too significant, making the climate enjoyable for visitors and residents alike.

July, the city’s wettest month, has a maximum daytime temperature of 23°C. During the driest month March you can expect a temperature of 3°C. For more detailed insights into the city’s temperatures, visit our Helsinki Temperature page.

Annual Precipitation in Finland

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

Amsterdam Precipitation Compared World Wide

Helsinki’s average annual precipitation is 736 mm. Let’s compare this to some popular worldwide tourist destinations:

Boston, USA, experiences 1238 mm of annual precipitation, including significant snowfall during the winter.

Beijing, China, receives 560 mm of annual precipitation, concentrated in the summer months.

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

• 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 Helsinki’s weather, including sunshine hours, humidity levels, and temperature data, visit our Helsinki Climate page.