TODAY MAR19
TEMPERATURE27
HUMIDITY77
PRESSURE101760
WIND COND.220 18.4
  • 6030Tue
  • 4325Wed
  • 4533Thu30%
  • 5127Fri50%30%
  • 4730Sat
daynightWeather update from Galesburg Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in St. Augustine for July is 74.7 degrees
  • The lowest monthly average temperature in St. Augustine for January is 24.4 degrees
  • The most monthly precipitation in St. Augustine occurs in September with 8.9 inches
  • The air quality index in St. Augustine is 3% better than the national average
  • The pollution index in St. Augustine is 63% better than the national average

Compare St. Augustine, IL Weather

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      St. Augustine 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"

      St. Augustine 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.
      IndexSt. AugustineIllinoisNational
      Air quality index414142
      Pollution index1,001,7103,148,6942,726,193

      St. Augustine air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality285
      Days with moderate air quality78
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      St. Augustine air quality information

      PollutantTotal
      Arsenic0.004%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.020%

      Average monthly St. Augustine temperature with heat index

      St. Augustine monthly precipitation with daily maximum

      St. Augustine monthly snow depth with daily maximum

      St. Augustine monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Good Hope, IL4052942.0%
      Bushnell, IL2,7892942.0%
      Roseville, IL8522942.0%
      Monmouth, IL8,8373236.0%
      Ellisville, IL964118.0%
      St. Augustine, IL1334118.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Aleknagik, AK1333138.0%
      Dutch Flat, CA1334412.0%
      Volta, CA133484.0%
      Bradgate, IA1331570.0%
      Floris, IA1332942.0%
      St. Augustine, IL1334118.0%
      Source: The St. Augustine, 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.