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

This page shows the average amount of rainfall per month in Selfoss. 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.

Selfoss has a notably wet climate with abundant precipitation, recording 1668 mm of rain/snowfall per year.

Monthly Precipitation Levels

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

Selfoss offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between September (177 mm) and June (89 mm) is not too significant, making the climate enjoyable for visitors and residents alike.

September, the city’s wettest month, has a maximum daytime temperature of 12°C. During the driest month June you can expect a temperature of 14°C. For more detailed insights into the city’s temperatures, visit our Selfoss Temperature page.

Annual Precipitation in Iceland

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

Amsterdam Precipitation Compared World Wide

Selfoss’s average annual precipitation is 1668 mm. Let’s compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm of rainfall mostly during the winter months.

In Shanghai, China, the annual average precipitation is 1347 mm, with a humid subtropical climate.

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Singapore, situated near the equator, gets 2581 mm of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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