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 varying between -8.3°C (17.1°F) and -1.2°C (29.8°F). With an average high-temperature of -1.2°C (29.8°F) and an average low-temperature of -8.3°C (17.1°F), January is the coldest month. Weather in January »
The last month of the winter, February, is a wintry month in Sarnia, Canada, with average temperature varying between -7.5°C (18.5°F) and 0.2°C (32.4°F). In February, the average high-temperature is almost the same as in January - a cold 0.2°C (32.4°F). Weather in February »

March, the first month of the spring, in Sarnia, is also a wintry month, with average temperature varying between -3.6°C (25.5°F) and 4.9°C (40.8°F). In March, the average high-temperature marginally rises, from 0.2°C (32.4°F) in February, to a still wintry 4.9°C (40.8°F). Weather in March »

April in Sarnia, Canada, is a fresh spring month, with average temperature ranging between min 1.7°C (35.1°F) and max 12°C (53.6°F). In Sarnia, the average high-temperature rises, from a wintry 4.9°C (40.8°F) in March, to a fresh 12°C (53.6°F). Weather in April »

The last month of the spring, May, is an enjoyable month in Sarnia, Canada, with temperature in the range of an average low of 7.1°C (44.8°F) and an average high of 18.3°C (64.9°F). In May, the average high-temperature rises, from a cool 12°C (53.6°F) in April, to an enjoyable 18.3°C (64.9°F). Weather in May »

June, the first month of the summer, in Sarnia, is a warm month, with temperature in the range of an average low of 12.6°C (54.7°F) and an average high of 23.8°C (74.8°F). In Sarnia, the average high-temperature in June rises, from a comfortable 18.3°C (64.9°F) in May, to a moderately hot 23.8°C (74.8°F). Weather in June »

July, the same as June, is another warm summer month in Sarnia, Canada, with average temperature fluctuating between 15.8°C (60.4°F) and 26.4°C (79.5°F). The warmest month is July, with an average high-temperature of 26.4°C (79.5°F) and an average low-temperature of 15.8°C (60.4°F). Weather in July »

The last month of the summer, August, is also a moderately hot month in Sarnia, Canada, with average temperature varying between 25.2°C (77.4°F) and 14.8°C (58.6°F). In Sarnia, the average high-temperature is relatively the same as in July - a still warm 25.2°C (77.4°F). Weather in August »

September, the first month of the autumn, in Sarnia, is also an agreeable month, with average temperature fluctuating between 21.7°C (71.1°F) and 11°C (51.8°F). In September, the average high-temperature marginally drops, from a warm 25.2°C (77.4°F) in August, to an agreeable 21.7°C (71.1°F). Weather in September »

October, the same as September, in Sarnia, Canada, is a moderate autumn month, with average temperature fluctuating between 5.3°C (41.5°F) and 14.7°C (58.5°F). In Sarnia, the average high-temperature drops, from an agreeable 21.7°C (71.1°F) in September, to a moderate 14.7°C (58.5°F). Weather in October »

The last month of the autumn, November, is also a frosty month in Sarnia, Canada, with average temperature ranging between min 0.6°C (33.1°F) and max 8°C (46.4°F). In Sarnia, the average high-temperature in November decreases, from a moderate 14.7°C (58.5°F) in October, to a chilly 8°C (46.4°F). Weather in November »

December, the first month of the winter, in Sarnia, is also a wintry month, with average temperature varying between 1.5°C (34.7°F) and -5.1°C (22.8°F). In Sarnia, the average high-temperature decreases, from a frosty 8°C (46.4°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 in Sarnia, Canada, is January, with an average high-temperature of -1.2°C (29.8°F) and an average low-temperature of -8.3°C (17.1°F).

How many days does it rain in Sarnia?

Throughout the year, in Sarnia, there are 116.9 rainfall days, and 770.1mm (30.3") of precipitation is accumulated.

What is the driest month in Sarnia?

The month with the least rainfall in Sarnia, Canada, is January when the rain falls for 5 days and typically collects 22.9mm (0.9") of precipitation.

When does it snow in Sarnia?

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

How many days does it snow in Sarnia?

Throughout the year, there are 41.3 snowfall days, and 1119.8mm (44.1") of snow is accumulated.

What is the snowiest month in Sarnia?

January is the month with the most snowfall in Sarnia, Canada. Snow falls for 11.3 days and accumulates 310mm (12.2") of snow.

What is the least humid month in Sarnia?

February is the least humid month in Sarnia, with an average relative humidity of 82.8%.

What months are the sea coldest in Sarnia?

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

When it does not snow in Sarnia?

In Sarnia, Canada, snow does not fall in May through September.

When are the longest days in Sarnia?

The month with the longest days is June, with an average of 15.3h of daylight.

What is the warmest month in Sarnia?

The warmest month in Sarnia, Canada, is July, with an average high-temperature of 26.4°C (79.5°F) and an average low-temperature of 15.8°C (60.4°F).

What month has the most sunshine in Sarnia?

The month with the most sunshine in Sarnia, Canada, is July, with an average of 9.6h of sunshine.

What is the most humid month in Sarnia?

August is the most humid month in Sarnia, Canada, with an average relative humidity of 91.5%.

What month is the sea warmest in Sarnia?

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

What is the rainiest month in Sarnia?

September is the month with the most rainfall. Rain falls for 11.4 days and accumulates 104.7mm (4.1") of precipitation.

What is the month with the shortest days in Sarnia?

December has the shortest days of the year in Sarnia, with an average of 9.1h of daylight.

What is the month with the least sunshine in Sarnia?

December has the least sunshine of the year, with an average of 2.2h of sunshine.
Average humidity - Sarnia, Canada
Average rainfall - Sarnia, Canada

The wettest month (with the highest rainfall) is September (104.7mm).
The driest month (with the lowest rainfall) is January (22.9mm).

Average rainfall days - Sarnia, Canada

The month with the highest number of rainy days is May (12.6 days).
The month with the lowest number of rainy days is February (4.9 days).

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

The month with the highest number of snowfall days is January (11.3 days).
Months with the lowest number of snowfall days are May, 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).
Coldest months (with the lowest average sea temperature) are February and March (0.3°C).

Average daylight / Average sunshine - Sarnia, Canada