Temperature
Pleasant by day, mild at night.
77°Ftypical Aug high
Ottawa
Canada · North America
Ottawa is most comfortable in summer and early autumn. Summers are warm and winters are cold. Humidity is usually low.
Best time to go
12 mo · Typical year
Temperature range
8°F to 79°F
Rain
13 days/mo
Sunshine
8.2 h/day
Humidity feel
Generally dry
When to visit
Month-by-month fit
Precipitation
Recurring showers across the month.
45%wet-day frequency
AmountWet-day chance
Sunshine
Plenty of sun this month.
11 hAug sunshine
Heat & humidity by month
Brief hot afternoons are possible, with mostly dry air.
LowAug heat feel
Air-feel chart data is unavailable for this destination. Use the selected-month dew point, temperature, rain, and sunshine context together rather than treating any one metric as total comfort.
More detailIncludes sky and daypart comfort
Cloud cover
Partly cloudy across the month.
45%Aug clear sky
ClearCloud cover
Similar
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Want a side-by-side climate view? Compare Ottawa with Chicago.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology