TODAY MAR01
TEMPERATURE45
HUMIDITY53
PRESSURE30.31
WIND COND.300 13
  • 5033Tue
  • 5732Wed
  • 5431Thu
  • 5132Fri
  • 5132Sat
daynightWeather update from St. Louis Regional Airport at

Key findings

  • The highest monthly average temperature in Grantfork for July is 77 degrees
  • The lowest monthly average temperature in Grantfork for January is 31 degrees
  • The most monthly precipitation in Grantfork occurs in July with 7.3 inches
  • The air quality index in Grantfork is 9% worse than the national average
  • The pollution index in Grantfork is 87% better than the national average

Compare Grantfork, IL Weather

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      Grantfork 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
      January24°F41°F31°F3.4"
      February25°F43°F33°F3.7"
      March38°F57°F46°F3.1"
      April47°F68°F56°F6.6"
      May56°F76°F65°F6.1"
      June65°F85°F75°F3.5"
      July67°F87°F77°F7.3"
      August66°F86°F75°F6.8"
      September58°F80°F68°F4.4"
      October47°F68°F57°F6.7"
      November36°F56°F45°F4.9"
      December28°F43°F35°F6.3"

      Grantfork 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.
      IndexGrantforkIllinoisNational
      Air quality index544150
      Pollution index647,2803,347,2955,066,862

      Grantfork air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Grantfork air quality information

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

      Average monthly Grantfork temperature with heat index

      Grantfork monthly precipitation with daily maximum

      Grantfork monthly snow depth with daily maximum

      Grantfork monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Greenville, IL6,8334314%
      Breese, IL4,5904314%
      Donnellson, IL176548%
      Sorento, IL530548%
      Old Ripley, IL103548%
      Grantfork, IL360548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Buena Vista, CA3604510%
      Nichols, IA3603236%
      Bennett, IA3603236%
      Downsville, MD3604020%
      Freeburn, KY360295490%
      Grantfork, IL360548%
      Source: The Grantfork, 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.