TODAY MAY19
TEMPERATURE86
HUMIDITY46
PRESSURE101560
WIND COND.100 14.8
  • 8766Mon
  • 9071Tue
  • 8662Wed40%
  • 7962Thu
  • 8263Fri
daynightWeather update from Southern Illinois Airport at
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Weather Quick Facts

  • The highest monthly average temperature in De Soto for July is 77.9 degrees
  • The lowest monthly average temperature in De Soto for January is 33.8 degrees
  • The most monthly precipitation in De Soto occurs in April with 6.2 inches
  • The air quality index in De Soto is 2% worse than the national average
  • The pollution index in De Soto is 79% better than the national average

Compare De Soto, IL Weather

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      De Soto 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°F44°F34°F2.3"
      February27°F46°F36°F2.5"
      March38°F60°F48°F4.8"
      April47°F70°F58°F6.2"
      May56°F78°F67°F4.9"
      June66°F88°F76°F4.1"
      July68°F89°F78°F5.0"
      August66°F88°F76°F3.5"
      September57°F81°F68°F3.4"
      October46°F71°F58°F3.6"
      November36°F58°F46°F3.7"
      December30°F47°F38°F3.7"

      De Soto 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.
      IndexDe SotoIllinoisNational
      Air quality index434142
      Pollution index569,1783,148,6942,726,193

      De Soto air quality information

      MeasurementTotal
      Days measured344
      Days with good air quality269
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      De Soto air quality information

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

      Average monthly De Soto temperature with heat index

      De Soto monthly precipitation with daily maximum

      De Soto monthly snow depth with daily maximum

      De Soto monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Dowell, IL3564314.0%
      Royalton, IL1,1074314.0%
      Carbondale, IL25,4004314.0%
      Gorham, IL2634314.0%
      Harrison, IL9344314.0%
      De Soto, IL1,6524314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Boulevard Gardens, FL1,6524118.0%
      Berrien Springs, MI1,6523922.0%
      Bent Creek, NC1,6524412.0%
      Hildebran, NC1,6524314.0%
      Port Norris, NJ1,6524020.0%
      De Soto, IL1,6524314.0%
      Source: The De Soto, 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.