Sarnia Climate by Month
The climate in Sarnia 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 Sarnia, temperatures differ significantly between summer and winter months. Average daytime temperatures range from a comfortable 27°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 -7°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
On average, Sarnia receives a reasonable amount of rain/snowfall, with an annual precipitation of 970 mm. Year-round, Sarnia has a balanced climate with minimal variation in precipitation. The difference between the wettest month, June, with 97 mm, and the driest month, March, with 66 mm, is minimal.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
The best time of year to visit Sarnia in Canada
During the months of June 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:
July has an average maximum temperature of 27°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 0°C.
June tops the wettest month list with 97 mm of rainfall.
March is the driest month with 66 mm of precipitation.
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.
