Best year time to visit City of Ontario

General weather information about City of Ontario

Average annual temperature is 17.0 °C

Absolute maximum temperature: 41.1 °C

Absolute minimum temperature: 0.4 °C

Number of sunny days: 273 days

Number of rainy days: 92 days

Look at detailed online map of City of Ontario

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

City of Ontario air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)19.725.122.032.630.532.139.141.136.937.331.027.3
Average daytime temperature (°C)15.517.616.523.423.626.034.733.429.329.524.420.5
Average temperature (°C)10.110.611.015.216.518.624.824.421.520.516.113.5
Average night temperature (°C)6.35.67.39.611.913.416.717.616.414.310.18.3
Absolute minimum temperature (°C)2.51.30.44.28.311.013.015.013.49.26.14.7

City of Ontario monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.211.012.013.013.914.414.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)6.48.17.510.910.411.212.911.39.810.08.88.0
Precipitation (mm)2619519721220528041794
Sunny days161712272324312723272224
Rainy days151119386047487
Snow days000000000000

City of Ontario - weather forecast by months

City of Ontario weather in januaryCity of Ontario weather in februaryCity of Ontario weather in marchCity of Ontario weather in aprilCity of Ontario weather in mayCity of Ontario weather in juneCity of Ontario weather in julyCity of Ontario weather in augustCity of Ontario weather in septemberCity of Ontario weather in octoberCity of Ontario weather in novemberCity of Ontario weather in december

Best time to visit City of Ontario:

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

  • July — 12.9(h)

The largest precipitation sum in City of Ontario is at

  • January — 261(mm)
  • February — 95(mm)
  • March — 197(mm)
  • December — 94(mm)

    • Weather forecast in the closest to City of Ontario admin centers

    Weather forecast in the closest towns to City of Ontario

    Explore City of Ontario

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

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