Dundas (ON) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Dundas, Ontario, Canada. This average is based on long-term data collected between 1990 and 2020. Now, let's break down all the details for a clearer picture.

On average, Dundas receives a reasonable amount of rain/snowfall, with an annual precipitation of 967 mm (38 in).

Monthly Precipitation Levels

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

Precipitation levels in Dundas remain relatively steady throughout the year. June has the most rain, with 98 mm (3.9 in) over 10 days. In February, this drops slightly to 65 mm (2.6 in), making the city's climate fairly predictable.

June, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 281 hours of sunshine in this period. During the driest month February you can expect a temperature of 1°C (34°F). For more detailed insights into the city's temperatures, visit our Dundas Temperature page.

Dundas's average annual precipitation is 967 mm (38 in). Let's compare this to some popular worldwide tourist destinations:

Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

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.

The proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

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