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Ajax (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ajax.
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Climate overview of Ajax
Ajax, Ontario, Canada, experiences significant temperature variation throughout the year. Summers bring daytime highs of 25°C (77°F) in July, while winters cool to 0°C (32°F) in January.
With around 1007 mm (40 in) of annual rain/snowfall, Ajax has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has warm summers and very cold winters. The wettest month is April. Sunshine peaks in July, when the city sees around 9.3 hours of sunshine per day.
Ajax Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ajax - and find the best time to visit.
Monthly Temperature in Ajax
Depending on the time of the year, temperatures range from comfortable to very cold in Ajax. Average daytime temperatures reach a comfortable 25°C (77°F) in July. In January, the coolest month of the year, temperatures drop to a very cold 0°C (32°F).
At night, temperatures range from around 18°C (64°F) in July to -8°C (18°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ajax
Ajax has a relatively rain/snowy climate with high precipitation levels, averaging 1007 mm (40 in) of rain/snowfall annually. Despite minor fluctuations, Ajax enjoys fairly consistent precipitation throughout the year. In April, you can expect around 96 mm (3.8 in) of precipitation, while in February, Ajax receives about 68 mm (2.7 in). For more details, please visit our Ajax 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 Ajax
Ajax can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.3 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.6 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Toronto, Canada (36 KM, 22 Miles).
Daily hours of sunshine
Data from: Toronto, Canada (36 KM, 22 Miles).
Daily percentage of sunshine
Data from: Toronto, Canada (36 KM, 22 Miles).
Humidity in Ajax by Month
The city experiences its highest humidity in September, reaching 87%. In April, the humidity drops to its lowest level at 76%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Toronto, Canada (36 KM, 22 Miles).
Best Time to Visit Ajax
Conditions in Ajax are generally most comfortable in June, July, August and September. They are typically least comfortable in January, February, March, April, 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
cold
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 -8°C (18°F).
Frequently asked questions about the climate in Ajax
What is the best time to visit Ajax?
June, July, August and September typically offer the most optimal weather in Ajax. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Ajax has warm summers and very cold winters.
What temperatures can I expect in Ajax?
Daytime highs range from 0°C (32°F) in January to 25°C (77°F) in July. Nighttime lows range from -8°C (18°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Ajax get?
Annual rainfall is around 1007 mm (40 in). April is the wettest month with 96 mm (3.8 in), while February is the driest with 68 mm (2.7 in).
How sunny is Ajax?
Ajax receives around 2,070 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 78 hours. Overall, Ajax enjoys abundant sunshine.
Ajax 3-Day Forecast
Ajax on the map
Ajax 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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