Monthly weather forecast and climate
Saint John, Canada

What is the coldest month in Saint John?

January is the coldest month in Saint John, Canada, with an average high-temperature of -2.5°C (27.5°F) and an average low-temperature of -13.3°C (8.1°F).

How much does it rain in Saint John?

Throughout the year, in Saint John, Canada, there are 122.1 rainfall days, and 1076.1mm (42.4") of precipitation is accumulated.

When does it snow in Saint John?

Months with snowfall in Saint John are January through May, October through December.

How much does it snow in Saint John?

In Saint John, during the entire year, snow falls for 52.7 days, and aggregates up to 2395mm (94.3") of snow.

What is the snowiest month in Saint John?

January is the month with the most snowfall in Saint John, Canada. Snow falls for 12.9 days and accumulates 643mm (25.3") of snow.

What is the driest month in Saint John?

The month with the least rainfall in Saint John is February when the rain falls for 5.3 days and typically collects 49mm (1.9") of precipitation.

When is the sea coldest in Saint John?

With an average sea temperature of 2.9°C (37.2°F), March is the month with the coldest seawater in Saint John. For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the warmest month in Saint John?

With an average high-temperature of 22.6°C (72.7°F) and an average low-temperature of 11.6°C (52.9°F), July is the warmest month in Saint John, Canada.

When is the sea warmest in Saint John?

Month with the warmest seawater in Saint John is August, with an average sea temperature of 13.3°C (55.9°F). Swimming in 13.3°C (55.9°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the rainiest month in Saint John?

The month with the most rainfall in Saint John, Canada, is November when the rain falls for 12.5 days and typically aggregates up to 123.7mm (4.9") of precipitation.
Average temperature - Saint John, Canada
Average rainfall - Saint John, Canada

The wettest month (with the highest rainfall) is November (123.7mm).
The driest month (with the lowest rainfall) is February (49mm).

Average rainfall days - Saint John, Canada

The month with the highest number of rainy days is May (13.6 days).
The month with the lowest number of rainy days is February (5.3 days).

Average snowfall - Saint John, Canada
Average snowfall days - Saint John, Canada

The month with the highest number of snowfall days is January (12.9 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature - Saint John, Canada

The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (2.9°C).

Average daylight / Average sunshine - Saint John, Canada
Average UV index - Saint John, Canada
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