Ottawa climate

Typical historical weather for Ottawa, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Ottawa.

Annual average

14.2°C

across all months

Warmest month

31.6°C

Jul average high

Coolest month

-4.5°C

Jan average low

Annual rainfall

1028mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

39°C

19 August 2023

Coldest day

-24.2°C

16 February 2021

Wettest day

98.1mm

29 July 2018

Windiest day

9.2m/s

29 October 2024