Saint John Weather and Climate: A Comprehensive Guide
The temperature in Saint John can vary greatly throughout the year.
The temperatures shift from pleasant
to very cold.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
Depending on the time of the year, temperatures range from pleasant to very cold in Saint John. Average maximum daytime temperatures range from a pleasant 21°C in August, the warmest time of the year, to a very cold -1°C during cooler months like January.
At night, temperatures typically drop to an average of around -10°C during these months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Saint John has a relatively rain/snowy climate with high precipitation levels, averaging 1384 mm of rain/snowfall annually. Year-round, Saint John has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 140 mm, and the driest month, August, with 87 mm, is minimal.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
broken clouds and no rain overcast and no rain broken clouds and no rainForecast for Saint John
3 m/s
5 m/s
2 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Saint John in Canada
During the months of July and August 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:
August has an average maximum temperature of 21°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -1°C.
December tops the wettest month list with 140 mm of rainfall.
August is the driest month with 87 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.
