Monthly weather forecast and climate
Ottawa, Canada

A view of The Parliament Hill from the Ottawa River in Ottawa, Canada
A view of The Parliament Hill from the Ottawa River in Ottawa, Canada

Weather in January

January, the same as December, in Ottawa, Canada, is a freezing cold winter month, with temperature in the range of an average high of -6.3°C (20.7°F) and an average low of -14.5°C (5.9°F). January is the coldest month, with an average high-temperature of -6.3°C (20.7°F) and an average low-temperature of -14.5°C (5.9°F). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Ottawa, Canada, with average temperature varying between -4.9°C (23.2°F) and -13.3°C (8.1°F). In Ottawa, the average high-temperature is almost the same as in January - a still freezing cold -4.9°C (23.2°F). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Ottawa, Canada, with average temperature varying between -6.8°C (19.8°F) and 0.8°C (33.4°F). In Ottawa, the average high-temperature in March rises, from a subzero cold -4.9°C (23.2°F) in February, to a wintry 0.8°C (33.4°F). Weather in March »

Weather in April

April is a frosty spring month in Ottawa, Canada, with average temperature fluctuating between 0.4°C (32.7°F) and 9.1°C (48.4°F). In April, the average high-temperature significantly increases, from a cold 0.8°C (33.4°F) in March, to a frosty 9.1°C (48.4°F). Weather in April »

Weather in May

May, the last month of the spring, in Ottawa, is an enjoyable month, with average temperature varying between 7.1°C (44.8°F) and 17.7°C (63.9°F). In Ottawa, the average high-temperature significantly increases, from a chilly 9.1°C (48.4°F) in April, to a comfortable 17.7°C (63.9°F). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Ottawa, Canada, with temperature in the range of an average low of 11.3°C (52.3°F) and an average high of 21.6°C (70.9°F). In June, the average high-temperature marginally rises, from an enjoyable 17.7°C (63.9°F) in May, to an agreeable 21.6°C (70.9°F). Weather in June »

Weather in July

July in Ottawa, Canada, is a moderately hot summer month, with average temperature ranging between max 25.3°C (77.5°F) and min 14.5°C (58.1°F). With an average high-temperature of 25.3°C (77.5°F) and an average low-temperature of 14.5°C (58.1°F), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Ottawa, Canada, with temperature in the range of an average high of 24°C (75.2°F) and an average low of 13.7°C (56.7°F). In Ottawa, the average high-temperature in August is relatively the same as in July - a still moderately hot 24°C (75.2°F). Weather in August »

Weather in September

September, the first month of the autumn, in Ottawa, is also an agreeable month, with average temperature varying between 10°C (50°F) and 20.2°C (68.4°F). In September, the average high-temperature marginally drops, from a warm 24°C (75.2°F) in August, to an agreeable 20.2°C (68.4°F). Weather in September »

Weather in October

October, like September, in Ottawa, Canada, is a cool autumn month, with average temperature varying between 5°C (41°F) and 12.2°C (54°F). In Ottawa, the average high-temperature in October plummets, from an agreeable 20.2°C (68.4°F) in September, to a fresh 12.2°C (54°F). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Ottawa, Canada, with average temperature fluctuating between 4.6°C (40.3°F) and -2°C (28.4°F). In Ottawa, the average high-temperature decreases, from a fresh 12.2°C (54°F) in October, to a wintry 4.6°C (40.3°F). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Ottawa, Canada, with temperature in the range of an average low of -8.4°C (16.9°F) and an average high of -2.7°C (27.1°F). In Ottawa, the average high-temperature in December drops, from a wintry 4.6°C (40.3°F) in November, to a freezing cold -2.7°C (27.1°F). Weather in December »
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FAQ

What is the coldest month in Ottawa?

The coldest month in Ottawa is January, with an average high-temperature of -6.3°C (20.7°F) and an average low-temperature of -14.5°C (5.9°F).

What is the most humid month in Ottawa?

Months with the highest humidity in Ottawa, Canada, are January and February, with an average relative humidity of 91%.

How much does it rain in Ottawa?

Throughout the year, in Ottawa, there are 149.6 rainfall days, and 772mm (30.39") of precipitation is accumulated.

When does it snow in Ottawa?

Months with snowfall in Ottawa, Canada, are January through May, October through December.

How much does it snow in Ottawa?

Throughout the year, there are 83.3 snowfall days, and 1135mm (44.69") of snow is accumulated.

What is the snowiest month in Ottawa?

January is the month with the most snowfall in Ottawa. Snow falls for 19.8 days and accumulates 321mm (12.64") of snow.

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

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

What is the month with the least sunshine in Ottawa?

February has the least sunshine of the year in Ottawa, with an average of 2.8h of sunshine.

What is the least humid month in Ottawa?

May is the least humid month in Ottawa, Canada, with an average relative humidity of 77%.

When it does not snow in Ottawa?

June through September are months without snowfall in Ottawa.

When are the longest days in Ottawa?

With an average of 15.6h of daylight, June has the longest days of the year in Ottawa.

What is the month with the highest UV index in Ottawa?

June through August, with an average maximum UV index of 5, are months with the highest UV index in Ottawa.

What is the warmest month in Ottawa?

July is the warmest month, with an average high-temperature of 25.3°C (77.5°F) and an average low-temperature of 14.5°C (58.1°F).

What month has the most sunshine in Ottawa?

The month with the most sunshine is July, with an average of 10.2h of sunshine.

What is the driest month in Ottawa?

The month with the least rainfall is September when the rain falls for 12.9 days and typically collects 54mm (2.13") of precipitation.

What is the rainiest month in Ottawa?

The month with the most rainfall is October when the rain falls for 15 days and typically aggregates up to 78mm (3.07") of precipitation.

What is the month with the shortest days in Ottawa?

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

Average pressure
Ottawa, Canada

Average pressure - Ottawa, Canada

The month with the highest atmospheric pressure is March (1018mbar).
The month with the lowest atmospheric pressure is June (1012.5mbar).

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Average wind speed
Ottawa, Canada

Average wind speed - Ottawa, Canada

The windiest month (with the highest average wind speed) is April (14km/h).
The calmest month (with the lowest average wind speed) is July (9.8km/h).

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Average humidity
Ottawa, Canada

Average humidity - Ottawa, Canada

Months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (77%).

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Average rainfall
Ottawa, Canada

Average rainfall - Ottawa, Canada

The wettest month (with the highest rainfall) is October (78mm).
The driest month (with the least rainfall) is September (54mm).

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Average rainfall days
Ottawa, Canada

Average rainfall days - Ottawa, Canada

The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (5.9 days).

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Average snowfall
Ottawa, Canada

Average snowfall - Ottawa, Canada

The month with the highest snowfall is January (321mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days
Ottawa, Canada

Average snowfall days - Ottawa, Canada

The month with the highest number of snowfall days is January (19.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Ottawa, Canada

Average daylight / Average sunshine - Ottawa, Canada

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 2.8h).

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Average sunshine days
Ottawa, Canada

Average sunshine days - Ottawa, Canada

The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (9.1 days).

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Average UV index
Ottawa, Canada

Average UV index - Ottawa, Canada

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 1).

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Average visibility
Ottawa, Canada

Average visibility - Ottawa, Canada

Months with the highest visibility are April, May, June, July, August and October (9km).
Months with the lowest visibility are January and February (7km).

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