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Chelsea Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chelsea.
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Climate overview of Chelsea
The climate in Chelsea, Canada, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in July to -5°C (23°F) in January.
The city receives considerable rain/snowfall, with around 1089 mm (43 in) annually. June is the wettest month. It has warm summers and very cold winters. July is the sunniest month, averaging 9.3 hours of sunshine per day.
Chelsea Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chelsea - and find the best time to visit.
Monthly Temperature in Chelsea
In Chelsea, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -5°C (23°F) in the coolest month, January.
Nights vary from 15°C (59°F) in July to around -15°C (5°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chelsea
Chelsea experiences significant rain/snowfall throughout the year, averaging 1089 mm (43 in) of precipitation annually. Precipitation levels in Chelsea remain relatively steady throughout the year. June has the most rain, with 106 mm (4.2 in) over 13 days. In the driest month February, this drops slightly to 68 mm (2.7 in), making the city's climate fairly predictable. For more details, please visit our Chelsea Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Chelsea
For those who appreciate different seasons, Chelsea serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.3 hours of sunshine daily, and embrace the darker days in December, offering only 2.8 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Ottawa, Canada (18 KM, 11 Miles).
Daily hours of sunshine
Data from: Ottawa, Canada (18 KM, 11 Miles).
Daily percentage of sunshine
Data from: Ottawa, Canada (18 KM, 11 Miles).
Humidity in Chelsea by Month
The relative humidity is moderate throughout the year in Chelsea.
The city experiences its highest humidity in December, reaching 72%. In May, the humidity drops to its lowest level at 49%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Ottawa, Canada (18 KM, 11 Miles).
Best Time to Visit Chelsea
Conditions in Chelsea are generally most comfortable in May and August. They are typically least comfortable in January, February, March, October, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
mixed
May
excellent
Jun
very good
Jul
very good
Aug
excellent
Sep
very good
Oct
wet
Nov
cold
Dec
very cold
- Best overall: May and August
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -15°C (5°F).
Frequently asked questions about the climate in Chelsea
What is the best time to visit Chelsea?
May and August typically offer the most optimal weather in Chelsea. In contrast, January, February, March, October, November and December tend to have less optimal conditions. Chelsea has warm summers and very cold winters.
What temperatures can I expect in Chelsea?
Daytime highs range from -5°C (23°F) in January to 27°C (81°F) in July. Nighttime lows range from -15°C (5°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Chelsea get?
Annual rainfall is around 1089 mm (43 in). June is the wettest month with 106 mm (4.2 in), while February is the driest with 68 mm (2.7 in).
How sunny is Chelsea?
Chelsea receives around 2,087 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 83 hours. Overall, Chelsea enjoys abundant sunshine.
Chelsea 3-Day Forecast
Chelsea on the map
Chelsea is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
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22°C (72°F) Ottawa22°C (72°F) Quebec City
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