Oshawa Climate by Month
The climate in Oshawa is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to very cold in the cooler months.
It receives mid-range precipitation levels.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
In Oshawa, temperatures differ significantly between summer and winter months. Average daytime temperatures range from a comfortable 26°C in July, the warmest time of the year, to a very cold -0°C during cooler months like January. At night, temperatures typically average around -9°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
On average, Oshawa receives a reasonable amount of rain/snowfall, with an annual precipitation of 978 mm. Year-round, Oshawa has a balanced climate with minimal variation in precipitation. The difference between the wettest month, April, with 92 mm, and the driest month, February, with 65 mm, is minimal.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Oshawa. While July receives considerable daily sunshine with up to 9.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.6 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Oshawa.
Relative humidity over the year
The best time of year to visit Oshawa in Canada
During the months of June, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 26°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -0°C.
April tops the wettest month list with 92 mm of rainfall.
February is the driest month with 65 mm of precipitation.
July is the sunniest month with an average of 280 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
