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Ontario Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January20°F35°F27°F3.3"
February19°F34°F26°F3.0"
March29°F47°F37°F3.5"
April40°F62°F51°F3.3"
May49°F70°F59°F3.9"
June59°F80°F69°F5.8"
July61°F82°F72°F4.1"
August61°F81°F71°F5.2"
September54°F75°F64°F3.8"
October43°F62°F52°F3.9"
November34°F51°F42°F2.7"
December24°F38°F30°F3.9"

Did you know?

  • The highest monthly average temperature in Ontario for July is 72 degrees.
  • The lowest monthly average temperature in Ontario for February is 26 degrees.
  • The most monthly precipitation in Ontario occurs in June with 5.8 inches.
  • The air quality index in Ontario is 27% better than the national average.
  • The pollution index in Ontario is 76% better than the national average.

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Compare Ontario, OH Weather To Other Cities

Ontario air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexOntarioOhioNational
Air quality index364050
Pollution index1,197,8106,740,0015,066,862

Ontario air quality information

MeasurementTotal
Days measured214
Days with good air quality199
Days with moderate air quality15
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Ontario air quality information

PollutantTotal
Arsenic0.001%
Benzene0.020%
Carbon Tetrachloride0.001%
Lead0.010%
Mercury0.000%

Average monthly Ontario temperature with heat index

Ontario monthly precipitation with daily maximum

Ontario monthly snow depth with daily maximum

Ontario monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
New Washington, OH9403628%
Shiloh, OH7873628%
Bellville, OH1,9203628%
Edison, OH4153628%
Lucas, OH5273628%
Ontario, OH6,1173628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Silver Lake, NC6,1173922%
Monticello, KY6,1163628%
Eudora, KS6,1165816%
Fort Myers Shores, FL6,1163334%
Ridgefield, WA6,1123824%
Ontario, OH6,1173628%
Source: The Ontario, OH weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.