Sarnia
Canada
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Sarnia, Canada

January, the same as December, in Sarnia, Canada, is another subzero cold winter month, with average temperature fluctuating between -2.3°C (27.9°F) and -7.5°C (18.5°F). The coldest month is January, with an average high-temperature of -2.3°C (27.9°F) and an average low-temperature of -7.5°C (18.5°F). Weather in January »

The last month of the winter, February, is another freezing cold month in Sarnia, Canada, with average temperature varying between -7.3°C (18.9°F) and -1.1°C (30°F). In Sarnia, Canada, the average high-temperature in February is essentially the same as in January - a still subzero cold -1.1°C (30°F). Weather in February »

March, the first month of the spring, in Sarnia, is a cold month, with average temperature ranging between max 4.2°C (39.6°F) and min -2.4°C (27.7°F). In March, the average high-temperature rises, from a freezing cold -1.1°C (30°F) in February, to a cold 4.2°C (39.6°F). Weather in March »

April is a cool spring month in Sarnia, Canada, with average temperature fluctuating between 10.7°C (51.3°F) and 2.8°C (37°F). In Sarnia, Canada, the average high-temperature increases, from a wintry 4.2°C (39.6°F) in March, to a fresh 10.7°C (51.3°F). Weather in April »

May, the last month of the spring, in Sarnia, is an enjoyable month, with average temperature ranging between min 8.8°C (47.8°F) and max 18°C (64.4°F). In May, the average high-temperature rises, from a cool 10.7°C (51.3°F) in April, to a comfortable 18°C (64.4°F). Weather in May »

June, the first month of the summer, in Sarnia, is a pleasant month, with average temperature varying between 22.3°C (72.1°F) and 13.1°C (55.6°F). In Sarnia, the average high-temperature slightly increases, from an enjoyable 18°C (64.4°F) in May, to an agreeable 22.3°C (72.1°F). Weather in June »

July in Sarnia, Canada, is a moderately hot summer month, with average temperature ranging between min 16.3°C (61.3°F) and max 25.8°C (78.4°F). With an average high-temperature of 25.8°C (78.4°F) and an average low-temperature of 16.3°C (61.3°F), July is the warmest month. Weather in July »

The last month of the summer, August, is another warm month in Sarnia, Canada, with average temperature varying between 16.1°C (61°F) and 25.3°C (77.5°F). In Sarnia, the average high-temperature is relatively the same as in July - a still warm 25.3°C (77.5°F). Weather in August »

September, the first month of the autumn, in Sarnia, is also an agreeable month, with average temperature varying between 21.8°C (71.2°F) and 12.9°C (55.2°F). In Sarnia, the average high-temperature marginally drops, from a warm 25.3°C (77.5°F) in August, to a pleasant 21.8°C (71.2°F). Weather in September »

October, like September, is another mild autumn month in Sarnia, Canada, with average temperature fluctuating between 14.6°C (58.3°F) and 7.8°C (46°F). In October, the average high-temperature decreases, from a pleasant 21.8°C (71.2°F) in September, to a mild 14.6°C (58.3°F). Weather in October »

The last month of the autumn, November, is also a frosty month in Sarnia, Canada, with temperature in the range of an average low of 1.5°C (34.7°F) and an average high of 7.4°C (45.3°F). In November, the average high-temperature decreases, from a mild 14.6°C (58.3°F) in October, to a frosty 7.4°C (45.3°F). Weather in November »

The first month of the winter, December, is still a cold month in Sarnia, Canada, with temperature in the range of an average low of -3°C (26.6°F) and an average high of 1.5°C (34.7°F). In Sarnia, the average high-temperature decreases, from a frosty 7.4°C (45.3°F) in November, to a cold 1.5°C (34.7°F). Weather in December »

What is the coldest month in Sarnia?

The coldest month is January, with an average high-temperature of -2.3°C (27.9°F) and an average low-temperature of -7.5°C (18.5°F).

How much does it rain in Sarnia?

Throughout the year, there are 140.4 rainfall days, and 493mm (19.41") of precipitation is accumulated.

When does it snow in Sarnia?

January through May, October through December are months with snowfall in Sarnia, Canada.

How many days does it snow in Sarnia?

In Sarnia, Canada, during the entire year, snow falls for 55.2 days, and aggregates up to 312mm (12.28") of snow.

What is the month with the least sunshine in Sarnia?

January has the least sunshine of the year in Sarnia, Canada, with an average of 2.9h of sunshine.

What are the months with the lowest UV index in Sarnia?

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

What is the most humid month in Sarnia?

February is the most humid month, with an average relative humidity of 86%.

What is the driest month in Sarnia?

The month with the least rainfall is February when the rain falls for 5.7 days and typically collects 28mm (1.1") of precipitation.

What is the snowiest month in Sarnia?

February is the month with the most snowfall. Snow falls for 12.8 days and accumulates 99mm (3.9") of snow.

What months are the sea coldest in Sarnia?

Months with the coldest seawater in Sarnia, Canada, are February and March, with an average sea temperature of 0.3°C (32.5°F).

What is the least humid month in Sarnia?

April and May, with an average relative humidity of 76%, are the least humid months in Sarnia.

What is the rainiest month in Sarnia?

May is the month with the most rainfall. Rain falls for 15.7 days and accumulates 54mm (2.13") of precipitation.

When it does not snow in Sarnia?

In Sarnia snow does not fall in June through September.

When are the longest days in Sarnia?

June has the longest days of the year in Sarnia, with an average of 15.3h of daylight.

What is the warmest month in Sarnia?

With an average high-temperature of 25.8°C (78.4°F) and an average low-temperature of 16.3°C (61.3°F), July is the warmest month in Sarnia.

What month has the most sunshine in Sarnia?

With an average of 10.3h of sunshine, July has the most sunshine of the year in Sarnia.

What are the months with the highest UV index in Sarnia?

Months with the highest UV index are July and August, with an average maximum UV index of 6.

What is the month with the warmest sea water in Sarnia?

August is the month with the warmest seawater in Sarnia, with an average sea temperature of 23.2°C (73.8°F).

What is the month with the shortest days in Sarnia?

The month with the shortest days in Sarnia, Canada, is December, with an average of 9.1h of daylight.
Average humidity - Sarnia, Canada
Average rainfall - Sarnia, Canada
Average rainfall days - Sarnia, Canada

The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (5.7 days).

Average snowfall - Sarnia, Canada
Average snowfall days - Sarnia, Canada

The month with the highest number of snowfall days is January (14.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature - Sarnia, Canada

The best month for swimming (with the highest average sea temperature) is August (23.2°C).
The coldest months (with the lowest average sea temperature) are February and March (0.3°C).

Average daylight / Average sunshine - Sarnia, Canada

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 2.9h).