Saint-Denis-sur-Richelieu (QC) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Saint-Denis-sur-Richelieu, Quebec, Canada. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.

Saint-Denis-sur-Richelieu is known for its substantial rain/snowfall, with annual precipitation reaching 1161 mm (46 in).

Monthly Precipitation Levels

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

Precipitation levels in Saint-Denis-sur-Richelieu remain relatively steady throughout the year. October has the most rain, with 113 mm (4.4 in) over 12 days. In February, this drops slightly to 73 mm (2.9 in), making the city's climate fairly predictable.

October, the wettest month, has a maximum daytime temperature of 14°C (57°F). The city receives 140 hours of sunshine in this period. During the driest month February you can expect a temperature of -2°C (28°F). For more detailed insights into the city's temperatures, visit our Saint-Denis-sur-Richelieu Temperature page.

Saint-Denis-sur-Richelieu's average annual precipitation is 1161 mm (46 in). Let's compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

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

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.

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.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) 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 Saint-Denis-sur-Richelieu (QC)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Saint-Denis-sur-Richelieu (QC) Climate page.