Saint John
Canada
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Saint John, Canada

January, like December, is another subzero cold winter month in Saint John, Canada, with temperature in the range of an average low of -13.3°C (8.1°F) and an average high of -2.5°C (27.5°F). January is the coldest month, with an average high-temperature of -2.5°C (27.5°F) and an average low-temperature of -13.3°C (8.1°F). Weather in January »
February, the last month of the winter, in Saint John, is also a subzero cold month, with average temperature ranging between max -1.5°C (29.3°F) and min -12.6°C (9.3°F). In Saint John, the average high-temperature is almost the same as in January - a still freezing cold -1.5°C (29.3°F). Weather in February »

March, the first month of the spring, in Saint John, is a cold month, with average temperature fluctuating between -7.4°C (18.7°F) and 2.4°C (36.3°F). In Saint John, the average high-temperature marginally rises, from a freezing cold -1.5°C (29.3°F) in February, to a cold 2.4°C (36.3°F). Weather in March »

April in Saint John, Canada, is a frosty spring month, with average temperature varying between 8.5°C (47.3°F) and -1.2°C (29.8°F). In Saint John, Canada, the average high-temperature increases, from a wintry 2.4°C (36.3°F) in March, to a chilly 8.5°C (47.3°F). Weather in April »

The last month of the spring, May, is a mild month in Saint John, Canada, with temperature in the range of an average low of 3.9°C (39°F) and an average high of 15°C (59°F). In May, the average high-temperature increases, from a chilly 8.5°C (47.3°F) in April, to a mild 15°C (59°F). Weather in May »

June, the first month of the summer, in Saint John, is a comfortable month, with average temperature varying between 8.4°C (47.1°F) and 19.6°C (67.3°F). In Saint John, the average high-temperature marginally rises, from a mild 15°C (59°F) in May, to an enjoyable 19.6°C (67.3°F). Weather in June »

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

The last month of the summer, August, is another pleasant month in Saint John, Canada, with average temperature varying between 22.4°C (72.3°F) and 11.2°C (52.2°F). In Saint John, the average high-temperature in August is practically the same as in July - a still agreeable 22.4°C (72.3°F). Weather in August »

The first month of the autumn, September, is still a comfortable month in Saint John, Canada, with temperature in the range of an average high of 18.2°C (64.8°F) and an average low of 7.7°C (45.9°F). In September, the average high-temperature slightly decreases, from an agreeable 22.4°C (72.3°F) in August, to a comfortable 18.2°C (64.8°F). Weather in September »

October, the same as September, is a cool autumn month in Saint John, Canada, with temperature in the range of an average low of 2.8°C (37°F) and an average high of 12.3°C (54.1°F). In Saint John, Canada, the average high-temperature drops, from an enjoyable 18.2°C (64.8°F) in September, to a fresh 12.3°C (54.1°F). Weather in October »

November, the last month of the autumn, in Saint John, is another chilly month, with average temperature ranging between max 6.4°C (43.5°F) and min -1.9°C (28.6°F). In November, the average high-temperature decreases, from a cool 12.3°C (54.1°F) in October, to a frosty 6.4°C (43.5°F). Weather in November »

The first month of the winter, December, is also a wintry month in Saint John, Canada, with temperature in the range of an average low of -9.3°C (15.3°F) and an average high of 0.5°C (32.9°F). In December, the average high-temperature drops, from a chilly 6.4°C (43.5°F) in November, to a wintry 0.5°C (32.9°F). Weather in December »

What is the coldest month in Saint John?

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

How many days does it rain in Saint John?

In Saint John, Canada, during the entire year, the rain falls for 122.1 days and collects up to 1076.1mm (42.4") of precipitation.

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?

Throughout the year, in Saint John, Canada, there are 52.7 snowfall days, and 2395mm (94.3") of snow is accumulated.

What is the snowiest month in Saint John?

The month with the most snowfall in Saint John, Canada, is January when snow falls for 12.9 days and typically aggregates up to 643mm (25.3") of snow.

When is the lowest UV index in Saint John?

Months with the lowest UV index in Saint John are January, November and December, with an average maximum UV index of 1.

What is the driest month in Saint John?

February is the month with the least rainfall. Rain falls for 5.3 days and accumulates 49mm (1.9") of precipitation.

What is the month with the coldest sea water in Saint John?

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

When are the longest days in Saint John?

June has the longest days of the year in Saint John, Canada, with an average of 15.6h of daylight.

What are the months with the highest UV index in Saint John?

June through August, with an average maximum UV index of 7, are months with the highest UV index.

What is the warmest month in Saint John?

The warmest month is July, with an average high-temperature of 22.6°C (72.7°F) and an average low-temperature of 11.6°C (52.9°F).

What month has the most sunshine in Saint John?

The month with the most sunshine in Saint John, Canada, is July, with an average of 7.3h of sunshine.

What month is the sea warmest in Saint John?

With an average sea temperature of 13.3°C (55.9°F), August is the month with the warmest seawater. 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 is November when the rain falls for 12.5 days and typically aggregates up to 123.7mm (4.9") of precipitation.

What is the month with the least sunshine in Saint John?

The month with the least sunshine in Saint John is November, with an average of 3.2h of sunshine.

What is the month with the shortest days in Saint John?

With an average of 8.8h of daylight, December has the shortest days of the year in Saint John, Canada.
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