TODAY FEB27
TEMPERATURE35
HUMIDITY95
PRESSURE29.86
WIND COND.
  • 5439Sat
  • 5124Sun
  • 4121Mon
  • 4732Tue
  • 5331Wed
daynightWeather update from Illinois Valley Regional Airport at

Key findings

  • The highest monthly average temperature in Tonica for July is 75 degrees
  • The lowest monthly average temperature in Tonica for January is 26 degrees
  • The most monthly precipitation in Tonica occurs in August with 8.2 inches
  • The air quality index in Tonica is 100% better than the national average
  • The pollution index in Tonica is 93% better than the national average

Compare Tonica, IL Weather

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      Tonica 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°F34°F26°F3.3"
      February19°F35°F26°F3.0"
      March32°F51°F40°F4.3"
      April42°F64°F52°F7.2"
      May53°F75°F63°F8.0"
      June62°F83°F72°F7.5"
      July66°F85°F75°F7.1"
      August64°F83°F73°F8.2"
      September56°F78°F66°F6.3"
      October45°F65°F54°F6.6"
      November34°F51°F42°F4.3"
      December23°F37°F30°F3.5"

      Tonica 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.
      IndexTonicaIllinoisNational
      Air quality index04150
      Pollution index339,1563,347,2955,066,862

      Tonica air quality information

      MeasurementTotal
      Days measured335
      Days with good air quality334
      Days with moderate air quality1
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Tonica air quality information

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

      Average monthly Tonica temperature with heat index

      Tonica monthly precipitation with daily maximum

      Tonica monthly snow depth with daily maximum

      Tonica monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      McNabb, IL3050100%
      Long Point, IL2080100%
      Granville, IL1,3050100%
      Standard, IL2340100%
      LaSalle, IL9,4840100%
      Tonica, IL7940100%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Gallatin Gateway, MT7942550%
      Pennville, IN7943530%
      Bude, MS7944412%
      Gillett, AR7944314%
      Tangipahoa, LA7943040%
      Tonica, IL7940100%
      Source: The Tonica, 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.