TODAY NOV09
TEMPERATURE41
HUMIDITY89
PRESSURE102440
WIND COND.70 5.4
  • 5951Sat90%
  • 6241Sun
  • 6038
  • 5842Tue
  • 6241Wed40%
daynightWeather update from Decatur Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Niantic for August is 78.1 degrees
  • The lowest monthly average temperature in Niantic for February is 29.4 degrees
  • The most monthly precipitation in Niantic occurs in June with 8.1 inches
  • The air quality index in Niantic is 5% worse than the national average
  • The pollution index in Niantic is 88% worse than the national average

Compare Niantic, IL Weather

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      Niantic 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°F38°F31°F6.8"
      February23°F37°F29°F3.4"
      March35°F56°F45°F3.0"
      April43°F65°F54°F4.2"
      May54°F78°F66°F3.1"
      June64°F86°F75°F8.1"
      July65°F86°F76°F4.0"
      August68°F89°F78°F3.9"
      September59°F85°F72°F7.7"
      October49°F71°F60°F7.1"
      November37°F56°F45°F6.1"
      December24°F37°F30°F2.5"

      Niantic 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.
      IndexNianticIllinoisNational
      Air quality index444142
      Pollution index5,136,0803,148,6942,726,193

      Niantic air quality

      MeasurementTotal
      Days measured365
      Days with good air quality255
      Days with moderate air quality110
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.090%
      Carbon Tetrachloride0.010%
      Lead0.390%
      Mercury0.020%

      Average monthly Niantic temperature with heat index

      Niantic monthly precipitation with daily maximum

      Niantic monthly snow depth with daily maximum

      Niantic monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Buffalo, IL3454020.0%
      Edinburg, IL1,0884020.0%
      Mechanicsburg, IL9184020.0%
      Broadwell, IL1884020.0%
      Cornland, IL714020.0%
      Niantic, IL6574412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Fairview, AL6574118.0%
      Canton, KS6574020.0%
      Hill City, MN6572942.0%
      Doe Run, MO657548.0%
      Ramona, OK6574510.0%
      Niantic, IL6574412.0%
      Source: The Niantic, 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.