Weather in Ottawa in August
Ottawa, Canada averages a high of 24.7°C (76.5°F) and low of 16.1°C (61°F) in August, with 11 rain days and 11 hours of daily sunshine. Travel score: 82.1/100 (Excellent). The best time to visit Ottawa is August.
High
25°C76°F
Low
16°C61°F
🌧️
11
rain days
☀️
11
hrs/day sunshine
💧
74%
humidity
82— Excellent
August in Ottawa is warm and occasionally wet — ideal for sightseeing and outdoor activities.
What are the average temperatures in Ottawa?
How much does it rain in Ottawa in August?
Ottawa receives an average of 93.9mm of rainfall across 11 rainy days in August. The annual total is 1003.6mm.
What should I pack for Ottawa in August?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°C
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (11 days)
☔
Umbrella
Be prepared for occasional showers
🎉Visiting Canada in August?
Don't miss any public holidays — check before you book!
Compare Ottawa
Popular comparisons:
How can I plan my trip to Ottawa?
What other cities are near Ottawa?
What are other popular cities in Canada?
What is the weather like in other months in Ottawa?
Data based on 1994–2024 averages · Last updated: 2024-12-31