Saint Georges Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Saint Georges, French Guiana. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's break down all the details for a clearer picture.

Saint Georges experiences significant rainfall throughout the year, averaging 2458 mm (97 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct rainy season during certain months. You can clearly see this in our monthly precipitation graphs below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

The climate in Saint Georges shows significant variation throughout the year. Expect 377 mm (15 in) of precipitation during the wettest month May, distributed over 26 rainy days.

In contrast, September offers drier and sunnier days, with around 42 mm (1.7 in) of rainfall over 6 rainy days.

May, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 111 hours of sunshine in this period. During the driest month September you can expect a temperature of 33°C (91°F). For more detailed insights into the city's temperatures, visit our Saint Georges Temperature page.

Saint Georges's average annual precipitation is 2458 mm (97 in). Let's compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.

Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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.

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

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• "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 (15 inches) wide and 20 cm (7.9 inches) 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 (103 feet) fell during the winter of 1972.

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