Best year time to visit Ontario

General weather information about Ontario

Average annual temperature is 11.3 °C

Absolute maximum temperature: 37.4 °C

Absolute minimum temperature: -25.6 °C

Number of sunny days: 206 days

Number of rainy days: 138 days

Number of snow days: 21 days

Look at detailed online map of Ontario

* Weather data for Ontario United States is based on climate observations for 2026 year

Ontario air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.912.523.527.231.732.034.637.435.131.718.212.9
Average daytime temperature (°C)0.33.67.517.325.029.028.528.826.517.610.96.5
Average temperature (°C)-3.8-2.11.610.418.323.023.123.820.612.95.32.2
Average night temperature (°C)-6.8-6.6-2.74.712.017.318.019.115.68.81.0-1.0
Absolute minimum temperature (°C)-25.6-25.3-13.0-4.62.48.812.113.09.9-4.3-11.5-6.2

Ontario monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.013.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.510.611.913.414.615.214.913.812.511.19.89.2
Daylight minimum duration (h)9.010.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)4.77.07.59.911.212.312.211.410.47.07.24.8
Precipitation (mm)653852548442877163158939
Sunny days151715181816141615162323
Rainy days79111113141715151457
Snow days925100000121

Ontario - weather forecast by months

Ontario weather in januaryOntario weather in februaryOntario weather in marchOntario weather in aprilOntario weather in mayOntario weather in juneOntario weather in julyOntario weather in augustOntario weather in septemberOntario weather in octoberOntario weather in novemberOntario weather in december

Best time to visit Ontario:

The best time to visit Ontario during the most sunny months:

  • May — 11.2(h)
  • June — 12.3(h)
  • July — 12.2(h)
  • August — 11.4(h)

The largest precipitation sum in Ontario is at

  • May — 84(mm)
  • July — 87(mm)
  • October — 158(mm)

    • Weather forecast in the closest to Ontario admin centers

    Weather forecast in the closest towns to Ontario

    Explore Ontario

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    MapTrains schedule
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    Frequently asked questions

    When is the best time to visit Ontario?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Ontario.
    What is the weather like in Ontario?
    See average temperature, rainfall and daylight hours for Ontario by month in the table above.
    How many sunny days does Ontario have?
    The monthly weather statistics above show sunshine and rainfall patterns for Ontario throughout the year.