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Key findings

  • The highest monthly average temperature in Saybrook for August is 76 degrees
  • The lowest monthly average temperature in Saybrook for February is 26 degrees
  • The most monthly precipitation in Saybrook occurs in October with 5.3 inches
  • The air quality index in Saybrook is 12% better than the national average
  • The pollution index in Saybrook is 53% worse than the national average

Compare Saybrook, IL Weather

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      Saybrook 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
      January22°F35°F28°F4.7"
      February20°F34°F26°F2.5"
      March33°F54°F42°F4.9"
      April42°F65°F52°F4.6"
      May53°F77°F65°F3.7"
      June64°F86°F74°F4.4"
      July65°F86°F75°F4.9"
      August66°F88°F76°F3.8"
      September59°F85°F70°F4.4"
      October48°F70°F57°F5.3"
      November34°F53°F42°F5.3"
      December20°F33°F26°F2.9"

      Saybrook 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.
      IndexSaybrookIllinoisNational
      Air quality index444150
      Pollution index7,745,2003,347,2955,066,862

      Saybrook air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality256
      Days with moderate air quality108
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Saybrook air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.070%
      Carbon Tetrachloride0.020%
      Lead0.860%
      Mercury0.210%

      Average monthly Saybrook temperature with heat index

      Saybrook monthly precipitation with daily maximum

      Saybrook monthly snow depth with daily maximum

      Saybrook monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Fisher, IL1,9894216%
      Mansfield, IL8484216%
      Elliott, IL2394216%
      Foosland, IL1084216%
      Melvin, IL5504216%
      Saybrook, IL7904412%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Waterproof, LA7903432%
      Gainesville, MO7903628%
      Andale, KS7904020%
      Melrose, OR7902452%
      Gallipolis Ferry, WV7904216%
      Saybrook, IL7904412%
      Source: The Saybrook, 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.