ClimateForecastNovemberDecember >>

Saint John Climate by Month

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 day and night temperature

Depending on the time of the year, temperatures range from pleasant to very cold in Saint John. Average 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 average around -10°C during these months.

The mean minimum and maximum temperatures throughout the year

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 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:
  • Which is the warmest month in Saint John?
    August has an average maximum temperature of 21°C and is the warmest month of the year.
  • Which is the coldest month in Saint John?
    The coldest month is January with an average maximum temperature of -1°C.
  • Which is the wettest month in Saint John?
    December tops the wettest month list with 140 mm of rainfall.
  • Which is the driest month in Saint John?
    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.

    Forecast for Saint John

    Fri   Nov 22
    8°C | 6°C
    E 25 km/h
    1.9 mm
    broken clouds and rain

    broken clouds and rain

    Sat   Nov 23
    8°C | 2°C
    NE 29 km/h
    44 mm
    overcast and heavy rain

    overcast and heavy rain

    Sun   Nov 24
    6°C | 2°C
    NW 25 km/h
    4.7 mm
    overcast and rain

    overcast and rain