TODAY NOV14
TEMPERATURE45
HUMIDITY100
PRESSURE101050
WIND COND.300 22.3
  • 5639Fri
  • 5847Sat
  • 6142Sun
  • 5948Mon30%90%
  • 5637Tue
daynightWeather update from Galesburg Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Henderson for July is 74.7 degrees
  • The lowest monthly average temperature in Henderson for January is 24.4 degrees
  • The most monthly precipitation in Henderson occurs in September with 8.9 inches
  • The air quality index in Henderson is 9% worse than the national average
  • The pollution index in Henderson is 37% better than the national average

Compare Henderson, IL Weather

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      Henderson 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
      January17°F34°F24°F3.4"
      February18°F36°F26°F3.6"
      March32°F52°F41°F3.5"
      April41°F65°F52°F6.9"
      May52°F74°F63°F7.1"
      June62°F83°F72°F7.9"
      July65°F86°F75°F8.4"
      August63°F84°F73°F7.4"
      September54°F78°F65°F8.9"
      October44°F66°F54°F5.8"
      November32°F52°F41°F4.0"
      December22°F37°F29°F4.5"

      Henderson 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.
      IndexHendersonIllinoisNational
      Air quality index464142
      Pollution index1,709,2303,148,6942,726,193

      Henderson air quality

      MeasurementTotal
      Days measured365
      Days with good air quality217
      Days with moderate air quality145
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.001%
      Benzene0.050%
      Carbon Tetrachloride0.040%
      Lead0.001%
      Mercury0.001%

      Average monthly Henderson temperature with heat index

      Henderson monthly precipitation with daily maximum

      Henderson monthly snow depth with daily maximum

      Henderson monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Monmouth, IL8,8373236.0%
      Wataga, IL7784118.0%
      East Galesburg, IL5794118.0%
      Galesburg, IL30,4054118.0%
      Gilson, IL1944118.0%
      Henderson, IL280468.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Chuichu, AZ2807448.0%
      Deep River, IA2803530.0%
      South English, IA2803530.0%
      Arlington, IN2802844.0%
      Burns, KS2804020.0%
      Henderson, IL280468.0%
      Source: The Henderson, 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.