St. John's
Canada
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
St. John's, Canada

January, like December, is another subzero cold winter month in St. John's, with temperature in the range of an average high of -0.8°C (30.6°F) and an average low of -8.2°C (17.2°F). In St. Weather in January »
February, the last month of the winter, in St. John's, is also a subzero cold month, with average temperature fluctuating between -1.1°C (30°F) and -8.6°C (16.5°F). The coldest month in St. Weather in February »

March, the first month of the spring, in St. John's, is a cold month, with average temperature ranging between min -6.1°C (21°F) and max 1°C (33.8°F). In March, the average high-temperature in St. Weather in March »

April, the same as March, is a wintry spring month in St. John's, with average temperature ranging between min -1.9°C (28.6°F) and max 5.6°C (42.1°F). In April, the average high-temperature in St. Weather in April »

The last month of the spring, May, is a fresh month in St. John's, with temperature in the range of an average high of 11.1°C (52°F) and an average low of 1.7°C (35.1°F). In May, the average high-temperature in St. Weather in May »

The first month of the summer, June, is a mild month in St. John's, with average temperature varying between 15.8°C (60.4°F) and 5.9°C (42.6°F). In June, the average high-temperature in St. Weather in June »

July is an agreeable summer month in St. John's, with temperature in the range of an average low of 10.9°C (51.6°F) and an average high of 20.7°C (69.3°F). The warmest month in St. John's, Canada, is July, with an average high-temperature of 20.7°C (69.3°F) and an average low-temperature of 10.9°C (51.6°F). Weather in July »

August, the last month of the summer, in St. John's, is also an agreeable month, with temperature in the range of an average low of 11.6°C (52.9°F) and an average high of 20.5°C (68.9°F). In August, the average high-temperature in St. Weather in August »

September, the first month of the autumn, in St. John's, is also an enjoyable month, with average temperature varying between 16.5°C (61.7°F) and 8.2°C (46.8°F). In St. John's, the average high-temperature in September slightly decreases, from a pleasant 20.5°C (68.9°F) in August, to an enjoyable 16.5°C (61.7°F). Weather in September »

October, the same as September, is another fresh autumn month in St. John's, with average temperature ranging between max 10.8°C (51.4°F) and min 3.9°C (39°F). In October, the average high-temperature in St. Weather in October »

November, the last month of the autumn, in St. John's, is another chilly month, with temperature in the range of an average high of 6.4°C (43.5°F) and an average low of -0.3°C (31.5°F). In St. Weather in November »

The first month of the winter, December, is still a cold month in St. John's, with temperature in the range of an average low of -4.7°C (23.5°F) and an average high of 1.8°C (35.2°F). In December, the average high-temperature in St. Weather in December »

How much does it rain in St. John's?

In St. John's, during the entire year, the rain falls for 162.7 days and collects up to 1206.5mm (47.5") of precipitation.

When does it snow in St. John's?

January through June, October through December are months with snowfall.

How many days does it snow in St. John's?

In St. John's, Canada, during the entire year, snow falls for 79 days, and aggregates up to 3349.4mm (131.9") of snow.

What is the snowiest month in St. John's?

The month with the most snowfall in St. John's is January when snow falls for 18.3 days and typically aggregates up to 887mm (34.9") of snow.

What are the months with the lowest UV index in St. John's?

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

What is the coldest month in St. John's?

February is the coldest month, with an average high-temperature of -1.1°C (30°F) and an average low-temperature of -8.6°C (16.5°F).

What is the driest month in St. John's?

February is the month with the least rainfall. Rain falls for 8.6 days and accumulates 61.6mm (2.4") of precipitation.

What month is the sea coldest in St. John's?

With an average sea temperature of -0.4°C (31.3°F), March is the month with the coldest seawater in St. John's. 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 St. John's?

The month with the longest days in St. John's is June, with an average of 15.9h of daylight.

What are the months with the highest UV index in St. John's?

June and July, with an average maximum UV index of 7, are months with the highest UV index in St. John's, Canada.

What is the warmest month in St. John's?

July is the warmest month in St. John's, Canada, with an average high-temperature of 20.7°C (69.3°F) and an average low-temperature of 10.9°C (51.6°F).

What month has the most sunshine in St. John's?

With an average of 7h of sunshine, July has the most sunshine of the year.

What is the month with the warmest sea water in St. John's?

August is the month with the warmest seawater, with an average sea temperature of 13.9°C (57°F). Swimming in 13.9°C (57°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 St. John's?

The month with the most rainfall is October when the rain falls for 18.1 days and typically aggregates up to 153.7mm (6.1") of precipitation.

What is the month with the shortest days in St. John's?

The month with the shortest days in St. John's, Canada, is December, with an average of 8.5h of daylight.

What is the month with the least sunshine in St. John's?

December has the least sunshine of the year in St. John's, Canada, with an average of 2h of sunshine.
Average temperature - St. John
Average rainfall - St. John

The wettest month (with the highest rainfall) is October (153.7mm).
The driest month (with the lowest rainfall) is February (61.6mm).

Average rainfall days - St. John

The month with the highest number of rainy days is October (18.1 days).
The month with the lowest number of rainy days is February (8.6 days).

Average snowfall - St. John
Average snowfall days - St. John

The month with the highest number of snowfall days is January (18.3 days).
Months with the lowest number of snowfall days are July, August and September (0 days).

Average sea temperature - St. John

The best month for swimming (with the highest average sea temperature) is August (13.9°C).
The coldest month (with the lowest average sea temperature) is March (-0.4°C).

Average daylight / Average sunshine - St. John
Average UV index - St. John