Ottawa Weather in August
Canada · 30-year monthly averages
🌟 Great time to visit
August in Ottawa is warm, with average daytime highs around 26°C (78°F) and nighttime lows near 15°C (58°F). Expect roughly 87mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
Avg high
26°C
78°F
Avg low
15°C
58°F
Rainfall
87mm
moderate
Rainy days
8
days with ≥1mm
🎒 What to pack
- light summer clothing
- sunscreen and sunglasses
August vs the rest of the year
FAQ
- How hot is Ottawa in August?
- August in Ottawa is warm, with average daytime highs around 26°C (78°F) and nighttime lows near 15°C (58°F). Expect roughly 87mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
- Does it rain a lot in Ottawa in August?
- Ottawa sees around 87mm of precipitation in August on average — moderate by global standards.
- Is August a good time to visit Ottawa?
- August is one of the best months to visit Ottawa — comfortable temperatures and manageable rainfall.