TODAY MAR29
TEMPERATURE41
HUMIDITY41
PRESSURE101560
WIND COND.260 25.9
  • 4232Fri
  • 4635Sat50%
  • 4734Sun50%
  • 5140Mon40%
  • 5137Tue70%70%
daynightWeather update from Rochester, Greater Rochester International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Ontario for July is 72.1 degrees
  • The lowest monthly average temperature in Ontario for February is 26.2 degrees
  • The most monthly precipitation in Ontario occurs in July with 4.5 inches
  • The air quality index in Ontario is 12% better than the national average
  • The pollution index in Ontario is 12% better than the national average

Compare Ontario, NY Weather

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      Ontario Average Temperature

      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
      January18°F36°F27°F2.1"
      February17°F35°F26°F2.2"
      March25°F46°F35°F2.2"
      April36°F60°F47°F3.1"
      May47°F72°F59°F2.9"
      June56°F80°F68°F3.8"
      July61°F84°F72°F4.5"
      August59°F82°F70°F3.5"
      September53°F76°F64°F3.3"
      October43°F64°F53°F4.4"
      November33°F52°F42°F2.6"
      December25°F40°F32°F3.0"

      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.
      IndexOntarioNew YorkNational
      Air quality index374342
      Pollution index2,401,9506,179,2752,726,193

      Ontario air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality317
      Days with moderate air quality48
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Ontario air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.030%
      Carbon Tetrachloride0.010%
      Lead0.030%
      Mercury0.080%

      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

      CityPopulationAir Quality IndexNational Avg.
      East Rochester, NY6,5303726.0%
      Newark, NY8,8683726.0%
      Irondequoit, NY50,1413726.0%
      Sodus, NY1,7423726.0%
      Fairport, NY5,3363726.0%
      Ontario, NY2,0383726.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      San Pasqual, CA2,0387244.0%
      Chadbourn, NC2,0383040.0%
      South Amherst, OH2,03850= 100
      Jermyn, PA2,0383824.0%
      Bertsch-Oceanview, CA2,0372060.0%
      Ontario, NY2,0383726.0%
      Source: The Ontario, NY 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.