TODAY MAY28
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 7151Fri
  • 7150Sat
  • 7151Sun
  • 7361Mon
  • 8469Tue
daynightWeather update from Illinois Valley Regional Airport at
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LaSalle 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"

Did you know?

  • The highest monthly average temperature in LaSalle for July is 75 degrees.
  • The lowest monthly average temperature in LaSalle for January is 26 degrees.
  • The most monthly precipitation in LaSalle occurs in August with 8.2 inches.
  • The air quality index in LaSalle is 98% better than the national average.
  • The pollution index in LaSalle is 63% better than the national average.

Compare LaSalle, IL Weather To Other Cities

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      LaSalle 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.
      IndexLaSalleIllinoisNational
      Air quality index14150
      Pollution index1,874,4903,347,2955,066,862

      LaSalle air quality information

      MeasurementTotal
      Days measured351
      Days with good air quality351
      Days with moderate air quality
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      LaSalle air quality information

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

      Average monthly LaSalle temperature with heat index

      LaSalle monthly precipitation with daily maximum

      LaSalle monthly snow depth with daily maximum

      LaSalle monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dalzell, IL719198%
      Granville, IL1,305198%
      Ladd, IL1,178198%
      Mark, IL530198%
      Oglesby, IL3,834198%
      LaSalle, IL9,484198%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Amityville, NY9,484536%
      Winterville, NC9,4843236%
      Pryor Creek, OK9,4843628%
      Danville, IN9,4825918%
      Rifle, CO9,4884118%
      LaSalle, IL9,484198%
      Source: The LaSalle, 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.