TODAY NOV25
TEMPERATURE47
HUMIDITY65
PRESSURE101360
WIND COND.160 13
  • 4529Tue
  • 4435Wed70%
  • 432680%
  • 3418Fri
  • 3220Sat30%
daynightWeather update from Columbus, Ohio State University Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Westerville for August is 75.3 degrees
  • The lowest monthly average temperature in Westerville for February is 26.5 degrees
  • The most monthly precipitation in Westerville occurs in January with 8.6 inches
  • The air quality index in Westerville is 9% worse than the national average
  • The pollution index in Westerville is 691% worse than the national average

Compare Westerville, OH Weather

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      Westerville 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
      January25°F39°F32°F8.6"
      February19°F35°F27°F2.8"
      March32°F52°F41°F7.3"
      April40°F63°F51°F6.0"
      May48°F75°F62°F4.9"
      June61°F84°F73°F6.4"
      July63°F85°F74°F6.1"
      August65°F87°F75°F8.0"
      September56°F81°F68°F6.4"
      October48°F67°F57°F4.5"
      November34°F54°F44°F4.0"
      December24°F38°F31°F3.4"

      Westerville 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.
      IndexWestervilleOhioNational
      Air quality index464042
      Pollution index21,574,8004,472,3862,726,193

      Westerville air quality

      MeasurementTotal
      Days measured365
      Days with good air quality237
      Days with moderate air quality127
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.230%
      Carbon Tetrachloride0.100%
      Lead0.190%
      Mercury0.010%

      Average monthly Westerville temperature with heat index

      Westerville monthly precipitation with daily maximum

      Westerville monthly snow depth with daily maximum

      Westerville monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Centerburg, OH1,9304118.0%
      Hartford, OH3554118.0%
      Beechwood Trails, OH3,040468.0%
      Grandview Heights, OH8,254468.0%
      Marble Cliff, OH689468.0%
      Westerville, OH40,443468.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Lancaster, OH40,438468.0%
      Huber Heights, OH40,465476.0%
      Covington, KY40,466548.0%
      Wentzville, MO40,407548.0%
      New Tecumseth, ON40,488n/a 
      Westerville, OH40,443468.0%
      Source: The Westerville, 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.