TODAY NOV21
TEMPERATURE34
HUMIDITY96
PRESSURE100950
WIND COND.280 38.9
  • 4531Fri
  • 4834Sat
  • 5646Sun
  • 5525Mon40%
  • 3926Tue
daynightWeather update from University of Illinois - Willard at
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Weather Quick Facts

  • The highest monthly average temperature in Seymour for July is 74.3 degrees
  • The lowest monthly average temperature in Seymour for January is 26.5 degrees
  • The most monthly precipitation in Seymour occurs in June with 5 inches
  • The air quality index in Seymour is equal to the national average
  • The pollution index in Seymour is 74% better than the national average

Compare Seymour, IL Weather

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      Seymour 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
      January18°F36°F27°F1.7"
      February19°F38°F28°F1.8"
      March33°F54°F42°F2.3"
      April42°F67°F54°F4.2"
      May53°F77°F64°F4.2"
      June63°F85°F73°F5.0"
      July64°F85°F74°F4.5"
      August62°F84°F73°F2.4"
      September56°F80°F67°F3.4"
      October44°F67°F55°F3.7"
      November33°F53°F42°F2.8"
      December24°F39°F31°F2.7"

      Seymour 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.
      IndexSeymourIllinoisNational
      Air quality index424142
      Pollution index703,2183,148,6942,726,193

      Seymour air quality

      MeasurementTotal
      Days measured365
      Days with good air quality281
      Days with moderate air quality84
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly Seymour temperature with heat index

      Seymour monthly precipitation with daily maximum

      Seymour monthly snow depth with daily maximum

      Seymour monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Farmer City, IL2,0634216.0%
      Thomasboro, IL1,0364216.0%
      Bondville, IL4554216.0%
      White Heath, IL1534216.0%
      Ivesdale, IL2504216.0%
      Seymour, IL1454216.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Port Lions, AK1453138.0%
      Tanacross, AK1453824.0%
      Orrville, AL145524.0%
      Bieber, CA1454216.0%
      Daphnedale Park, CA1452942.0%
      Seymour, IL1454216.0%
      Source: The Seymour, 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.