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

This page shows both the average monthly rainfall and the number of rainy days in Kourou, French Guiana. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let’s break down all the details for a clearer picture.

Kourou experiences significant rainfall throughout the year, averaging 2561 mm of precipitation annually.

Monthly Precipitation Levels

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

Significant seasonal changes in precipitation occur throughout the year. During the wet season, May receives substantial rainfall, averaging 406 mm of precipitation, recorded across 26 rainy days.

In contrast, the drier season, September brings less rainfall, with 54 mm over 5 rainy days.

May, the wettest month, has a maximum daytime temperature of 29°C. The city receives 119 hours of sunshine in this period. During the driest month September you can expect a temperature of 31°C. For more detailed insights into the city’s temperatures, visit our Kourou Temperature page.

Annual Precipitation in French Guiana

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

Amsterdam Precipitation Compared World Wide

Kourou’s average annual precipitation is 2561 mm. Let’s compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm of rainfall annually, with precipitation evenly distributed throughout the year.

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.

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

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm wide and 20 cm thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters fell during the winter of 1972.

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