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

Monthly weather forecast and climate
Saint John, Canada

January, the same as December, in Saint John, Canada, is a freezing cold winter month, with average temperature fluctuating between -2.5°C (27.5°F) and -13.3°C (8.1°F). The coldest month is January, 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 »

The last month of the winter, February, is another freezing cold month in Saint John, Canada, with average temperature ranging between min -12.6°C (9.3°F) and max -1.5°C (29.3°F). In February, the average high-temperature is almost the same as in January - a still subzero cold -1.5°C (29.3°F). Weather in February »

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

April in Saint John, Canada, is a chilly spring month, with average temperature fluctuating between 8.5°C (47.3°F) and -1.2°C (29.8°F). In April, the average high-temperature increases, from a wintry 2.4°C (36.3°F) in March, to a frosty 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 high of 15°C (59°F) and an average low of 3.9°C (39°F). In May, the average high-temperature rises, from a chilly 8.5°C (47.3°F) in April, to a moderate 15°C (59°F). Weather in May »

June, the first month of the summer, in Saint John, is a comfortable month, with average temperature fluctuating between 19.6°C (67.3°F) and 8.4°C (47.1°F). In June, the average high-temperature slightly increases, from a moderate 15°C (59°F) in May, to a comfortable 19.6°C (67.3°F). Weather in June »

July is an agreeable summer month in Saint John, Canada, with average temperature fluctuating between 11.6°C (52.9°F) and 22.6°C (72.7°F). 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). Weather in July »

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

September, the first month of the autumn, in Saint John, is still a comfortable month, 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 marginally drops, 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 average temperature ranging between max 12.3°C (54.1°F) and min 2.8°C (37°F). In October, the average high-temperature drops, from a comfortable 18.2°C (64.8°F) in September, to a cool 12.3°C (54.1°F). Weather in October »

The last month of the autumn, November, is also a frosty month in Saint John, Canada, with temperature in the range of an average high of 6.4°C (43.5°F) and an average low of -1.9°C (28.6°F). In Saint John, the average high-temperature drops, 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 still a cold month in Saint John, Canada, with average temperature fluctuating between 0.5°C (32.9°F) and -9.3°C (15.3°F). In December, the average high-temperature drops, from a frosty 6.4°C (43.5°F) in November, to a cold 0.5°C (32.9°F). Weather in December »

What is the coldest month in Saint John?

The coldest month is January, 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?

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 are January through May, October through December.

How many days does it snow in Saint John?

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

When does it snow the most 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?

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

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.

When is the sea coldest in Saint John?

The month with the coldest seawater is March, with an average sea temperature of 2.9°C (37.2°F).

When it does not snow in Saint John?

In Saint John snow does not fall in June through September.

When are the longest days in Saint John?

June has the longest days of the year, with an average of 15.6h of daylight.

When is the highest UV index in Saint John?

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

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 is July, with an average of 7.3h of sunshine.

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

August is the month with the warmest seawater in Saint John, Canada, with an average sea temperature of 13.3°C (55.9°F).

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.

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

November has the least sunshine of the year, with an average of 3.2h of sunshine.

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

December has the shortest days of the year, with an average of 8.8h of daylight.
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