Saint-Louis Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Saint-Louis. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s explore all the details to give you a full picture.

Saint-Louis is known for its substantial rain/snowfall, with annual precipitation reaching 1199 mm.

Monthly Precipitation Levels

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

Year-round, Saint-Louis has a balanced climate with minimal variation in precipitation. The difference between the wettest month, May, with 123 mm, and the driest month, February, with 83 mm, is minimal.

May, the city’s wettest month, has a maximum daytime temperature of 20°C and receives 188 hours of sunshine. During the driest month February you can expect a temperature of 7°C. For more detailed insights into the city’s temperatures, visit our Saint-Louis Temperature page.

Annual Precipitation in France

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

Amsterdam Precipitation Compared World Wide

Saint-Louis’s average annual precipitation is 1199 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.

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

In Tokyo, Japan, the average annual precipitation is 1528 mm, with significant summer rains due to typhoon season.

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.

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