Ontario climate

Typical historical weather for Ontario, 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 Ontario.

Annual average

10°C

across all months

Warmest month

25.6°C

Jul average high

Coolest month

-4.3°C

Jan average low

Annual rainfall

1246mm

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

31.3°C

29 August 2022

Coldest day

-21.1°C

14 February 2016

Wettest day

65mm

17 July 2021

Windiest day

13.2m/s

25 February 2019