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Oakville (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Oakville.
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Climate overview of Oakville
Oakville, Ontario, Canada, sees big temperature differences between seasons, with July peaking at 27°C (81°F) and January dropping to 1°C (34°F).
The city receives around 975 mm (38 in) of rain/snowfall per year. It experiences warm summers and very cold winters. April is the wettest month and August the driest. The sunniest month is July, with 9.8 hours of sunshine per day on average.
Oakville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Oakville - and find the best time to visit.
Monthly Temperature in Oakville
Visitors to Oakville can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold 1°C (34°F) in January.
Nighttime temperatures range from 18°C (64°F) in July to -7°C (19°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Oakville
Generally, Oakville experiences moderate precipitation patterns, averaging 975 mm (38 in) yearly. The wettest period in Oakville occurs in April, which receives around 98 mm (3.9 in) of precipitation. During the driest month, August, Oakville experiences moderate rainfall, totaling 69 mm (2.7 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Oakville 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 Oakville
In Oakville, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 2.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Mississauga, Canada (15 KM, 9 Miles).
Daily hours of sunshine
Data from: Mississauga, Canada (15 KM, 9 Miles).
Daily percentage of sunshine
Data from: Mississauga, Canada (15 KM, 9 Miles).
Humidity in Oakville by Month
The relative humidity is high throughout the year in Oakville.
The city experiences its highest humidity in January, reaching 72%. In May, the humidity drops to its lowest level at 53%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Mississauga, Canada (15 KM, 9 Miles).
Best Time to Visit Oakville
For comfortable weather, consider visiting Oakville in June, July, August and September. Conditions are usually least favourable in January, February, March, 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
cold
Feb
cold
Mar
cold
Apr
mixed
May
good
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
cold
Dec
cold
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -7°C (19°F).
Frequently asked questions about the climate in Oakville
What is the best time to visit Oakville?
June, July, August and September typically offer the most optimal weather in Oakville. In contrast, January, February, March, November and December tend to have less optimal conditions. Oakville has warm summers and very cold winters.
What temperatures can I expect in Oakville?
Daytime highs range from 1°C (34°F) in January to 27°C (81°F) in July. Nighttime lows range from -7°C (19°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Oakville get?
Annual rainfall is around 975 mm (38 in). April is the wettest month with 98 mm (3.9 in), while August is the driest with 69 mm (2.7 in).
How sunny is Oakville?
Oakville receives around 2,184 hours of sunshine per year. July is the sunniest month with 295 hours, while January is the cloudiest with just 78 hours. Overall, Oakville enjoys abundant sunshine.
Oakville 3-Day Forecast
Oakville on the map
Oakville is highlighted - select any city to see its climate.
Popular in September
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