TODAY DEC22
TEMPERATURE38
HUMIDITY55
PRESSURE102640
WIND COND.190 27.7
  • 4232Mon20%30%
  • 4236Tue60%
  • 454040%30%
  • 5046Thu30%50%
  • 5547Fri
daynightWeather update from Decatur Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Westervelt for August is 78.1 degrees
  • The lowest monthly average temperature in Westervelt for February is 29.4 degrees
  • The most monthly precipitation in Westervelt occurs in June with 8.1 inches
  • The air quality index in Westervelt is 5% worse than the national average
  • The pollution index in Westervelt is 14% better than the national average

Compare Westervelt, IL Weather

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      Westervelt 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
      January24°F38°F31°F6.8"
      February23°F37°F29°F3.4"
      March35°F56°F45°F3.0"
      April43°F65°F54°F4.2"
      May54°F78°F66°F3.1"
      June64°F86°F75°F8.1"
      July65°F86°F76°F4.0"
      August68°F89°F78°F3.9"
      September59°F85°F72°F7.7"
      October49°F71°F60°F7.1"
      November37°F56°F45°F6.1"
      December24°F37°F30°F2.5"

      Westervelt 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.
      IndexWesterveltIllinoisNational
      Air quality index444142
      Pollution index2,357,2803,148,6942,726,193

      Westervelt air quality

      MeasurementTotal
      Days measured365
      Days with good air quality255
      Days with moderate air quality110
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.002%
      Benzene0.030%
      Carbon Tetrachloride0.004%
      Lead0.010%
      Mercury0.000%

      Average monthly Westervelt temperature with heat index

      Westervelt monthly precipitation with daily maximum

      Westervelt monthly snow depth with daily maximum

      Westervelt monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Strasburg, IL5284020.0%
      Shelbyville, IL4,1984020.0%
      Windsor village, IL9654020.0%
      Tower Hill, IL6434020.0%
      Windsor, IL1,1504020.0%
      Westervelt, IL334412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Panola, AL333628.0%
      El Capitan, AZ33476.0%
      Imogene, IA334020.0%
      Deer Grove, IL334216.0%
      Langdon, KS334020.0%
      Westervelt, IL334412.0%
      Source: The Westervelt, IL 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.