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Ontario Weather in August

With daytime temperatures of 33°C (91°F) and nighttime lows of 14°C (57°F), August in Ontario brings very high temperatures during the day. The perfect weather makes it an appealing time to visit.

Rainfall in Ontario in August

Analyzing past climate data, one can expect approximately 2 days of rain, averaging 5.7 mm (0.2 in). Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in Ontario in August

Ontario has perfect weather in August, with days reaching 33°C (91°F) and nights cooling to 14°C (57°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Should you favor a climate that's both dry and comfortably warm, April, May, June, September and October typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit the United States of America, check out our Ontario's climate page.

Ontario Temperature in August

Min TemperatureMin Temperature 14°C (57°F)  
Max TemperatureMax Temperature 33°C (91°F)  
Chance of RainChance of Rain 7%  
PrecipitationPrecipitation 5.7 mm (0.2 in)  
Rainy daysRainy days 2 days  

Best Places in the United States of America in August

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Ontario in August

Pack for serious heat in Ontario in August. Prioritize clothing that breathes and doesn't cling or stick. Lightweight cotton, linen, and moisture-wicking fabrics are ideal. A wide hat provides welcome shade. Dry conditions mean you won't need to worry about rain protection.

What To Do in Ontario in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling
8/10
Walking
8/10
Camping
10/10
Outdoor sports
8/10

Select a Month

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit the United States of America, check out our Ontario's climate page.

More climate data for Ontario