Monthly weather forecast and climate
Oshawa, Canada

What is the coldest month in Oshawa?

January is the coldest month in Oshawa, with an average high-temperature of -1.1°C (30°F) and an average low-temperature of -8.5°C (16.7°F).

How many days does it rain in Oshawa?

In Oshawa, Canada, during the entire year, the rain falls for 122.7 days and collects up to 766.1mm (30.2") of precipitation.

What is the driest month in Oshawa?

The month with the least rainfall in Oshawa, Canada, is January when the rain falls for 5.7 days and typically collects 30mm (1.2") of precipitation.

When does it snow in Oshawa?

Months with snowfall in Oshawa, Canada, are January through April, October through December.

How many days does it snow in Oshawa?

Throughout the year, in Oshawa, there are 27.5 snowfall days, and 1057mm (41.6") of snow is accumulated.

What is the snowiest month in Oshawa?

January is the month with the most snowfall in Oshawa, Canada. Snow falls for 8.7 days and accumulates 356mm (14") of snow.

When is the sea coldest in Oshawa?

Month with the coldest seawater is March, with an average sea temperature of 2.3°C (36.1°F). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the warmest month in Oshawa?

The warmest month in Oshawa, Canada, is July, with an average high-temperature of 25.1°C (77.2°F) and an average low-temperature of 15.9°C (60.6°F).

What is the month with the warmest sea water in Oshawa?

August is the month with the warmest seawater in Oshawa, Canada, with an average sea temperature of 22.4°C (72.3°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.4°C (72.3°F) water may be enjoyable. The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).

What is the rainiest month in Oshawa?

The month with the most rainfall is September when the rain falls for 12.1 days and typically aggregates up to 94mm (3.7") of precipitation.
Average temperature - Oshawa, Canada
Average rainfall - Oshawa, Canada

The wettest month (with the highest rainfall) is September (94mm).
The driest month (with the lowest rainfall) is January (30mm).

Average rainfall days - Oshawa, Canada

The month with the highest number of rainy days is October (13.4 days).
The month with the lowest number of rainy days is February (5 days).

Average snowfall - Oshawa, Canada
Average snowfall days - Oshawa, Canada

The month with the highest number of snowfall days is January (8.7 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature - Oshawa, Canada

The best month for swimming (with the highest average sea temperature) is August (22.4°C).
The coldest month (with the lowest average sea temperature) is March (2.3°C).

Average daylight - Oshawa, Canada
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