Montréal (QC) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Montréal, Quebec, Canada. 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.

Montréal is known for its substantial rain/snowfall, with annual precipitation reaching 1159 mm (46 in).

Monthly Precipitation Levels

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

The wettest period in Montréal occurs in October, which receives around 114 mm (4.5 in) of precipitation. During the driest month, February, Montréal experiences moderate snowfall, totaling approximately 72 mm (2.8 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate.

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 Montréal Temperature page.

Montréal's average annual precipitation is 1159 mm (46 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

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

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

Climate change is affecting precipitation patterns worldwide, including Montréal (QC):

• 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 Montréal (QC)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Montréal (QC) Climate page.