TODAY FEB27
TEMPERATURE33
HUMIDITY92
PRESSURE29.86
WIND COND.100 7.6
  • 4637Sat
  • 4723Sun
  • 3820Mon
  • 4431Tue
  • 5030Wed
daynightWeather update from Sterling Rockfalls at

Key findings

  • The highest monthly average temperature in Walnut for July is 74 degrees
  • The lowest monthly average temperature in Walnut for January is 23 degrees
  • The most monthly precipitation in Walnut occurs in November with 8 inches
  • The air quality index in Walnut is 16% better than the national average
  • The pollution index in Walnut is 59% better than the national average

Compare Walnut, IL Weather

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      Walnut 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
      January15°F32°F23°F3.9"
      February16°F34°F25°F2.5"
      March30°F49°F38°F3.6"
      April40°F64°F51°F5.7"
      May51°F75°F62°F7.1"
      June60°F83°F71°F7.2"
      July63°F85°F74°F7.6"
      August61°F83°F72°F7.2"
      September53°F78°F65°F6.0"
      October43°F65°F53°F4.0"
      November31°F51°F40°F8.0"
      December20°F36°F28°F4.2"

      Walnut 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.
      IndexWalnutIllinoisNational
      Air quality index424150
      Pollution index2,097,7403,347,2955,066,862

      Walnut air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality268
      Days with moderate air quality96
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Walnut air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.060%
      Carbon Tetrachloride0.000%
      Lead0.001%
      Mercury0.300%

      Average monthly Walnut temperature with heat index

      Walnut monthly precipitation with daily maximum

      Walnut monthly snow depth with daily maximum

      Walnut monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dover, IL1710100%
      Ohio, IL4700100%
      Wyanet, IL9910100%
      Malden, IL3090100%
      Amboy, IL2,5190100%
      Walnut, IL1,6014216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Dale, IN1,601688%
      Goshen, AR1,6014412%
      Garrett, WA1,6012354%
      Hampden-Sydney, VA1,6002648%
      Red Boiling Springs, TN1,6022550%
      Walnut, IL1,6014216%
      Source: The Walnut, 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.