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

This page shows the average amount of rainfall per month in Oslo. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s break down all the details for a clearer picture.

Generally, Oslo experiences moderate precipitation patterns, averaging 982 mm yearly.

Monthly Precipitation Levels

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

Oslo offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between August (112 mm) and March (54 mm) is not too significant, making the climate enjoyable for visitors and residents alike.

August, the city’s wettest month, has a maximum daytime temperature of 21°C. During the driest month March you can expect a temperature of 5°C. For more detailed insights into the city’s temperatures, visit our Oslo 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

Oslo’s average annual precipitation is 982 mm. Let’s compare this to some popular worldwide tourist destinations:

Athens, Greece, receives an average annual precipitation of 400 mm, making it one of the drier Mediterranean climates with rainfall mostly in winter.

Osaka, Japan, experiences 1507 mm of rainfall annually, spread across the year with wetter summers.

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

Mumbai, India, experiences a tropical monsoon climate with 1860 mm of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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.

How Does Precipitation Affect Local Climate?

Precipitation has a very strong role in determining the local climate and ecosystem:

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

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