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Key findings

  • The highest monthly average temperature in Sherman for July is 77 degrees
  • The lowest monthly average temperature in Sherman for January is 29 degrees
  • The most monthly precipitation in Sherman occurs in June with 5.5 inches
  • The air quality index in Sherman is 20% better than the national average
  • The pollution index in Sherman is 1% worse than the national average

Compare Sherman, IL Weather

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      Sherman 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
      January20°F38°F29°F2.1"
      February22°F41°F31°F1.9"
      March34°F56°F44°F2.9"
      April44°F68°F56°F4.3"
      May54°F77°F65°F4.5"
      June64°F86°F74°F5.5"
      July66°F88°F77°F4.3"
      August64°F86°F75°F3.2"
      September57°F81°F68°F3.7"
      October46°F69°F56°F3.7"
      November36°F55°F45°F2.5"
      December26°F41°F33°F2.8"

      Sherman 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.
      IndexShermanIllinoisNational
      Air quality index404150
      Pollution index5,136,0803,347,2955,066,862

      Sherman air quality information

      MeasurementTotal
      Days measured360
      Days with good air quality287
      Days with moderate air quality73
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Sherman air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.090%
      Carbon Tetrachloride0.010%
      Lead0.390%
      Mercury0.020%

      Average monthly Sherman temperature with heat index

      Sherman monthly precipitation with daily maximum

      Sherman monthly snow depth with daily maximum

      Sherman monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Grandview, IL1,3884020%
      Mechanicsburg, IL6234020%
      Middletown, IL3234020%
      Spaulding, IL7664020%
      Petersburg, IL2,3334020%
      Sherman, IL4,4044020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Port LaBelle, FL4,4043628%
      Whitfield, PA4,4034216%
      Lindstrom, MN4,406468%
      Greenville, KY4,4014314%
      Summerville, GA4,4084020%
      Sherman, IL4,4044020%
      Source: The Sherman, 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.