TODAY MAY29
TEMPERATURE64
HUMIDITY100
PRESSURE29.92
WIND COND.
  • 7452Fri20%
  • 7250Sat
  • 7150Sun
  • 7359Mon
  • 8568Tue
daynightWeather update from Danville, Vermilion County Airport at
How would you rate the weather in Potomac?
Write a review to give others more information about this area.
How would you rate the air quality in Potomac?
Write a review to give others more information about this area.
See all Potomac poll results

Potomac 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
January20°F36°F27°F5.6"
February20°F37°F28°F3.2"
March33°F53°F42°F4.2"
April44°F66°F54°F7.2"
May54°F75°F64°F7.5"
June63°F84°F73°F7.8"
July64°F85°F74°F7.8"
August62°F84°F73°F10.6"
September56°F79°F66°F7.9"
October45°F67°F55°F7.0"
November34°F53°F43°F6.5"
December26°F40°F32°F5.0"

Did you know?

  • The highest monthly average temperature in Potomac for July is 74 degrees.
  • The lowest monthly average temperature in Potomac for January is 27 degrees.
  • The most monthly precipitation in Potomac occurs in August with 10.6 inches.
  • The air quality index in Potomac is 28% better than the national average.
  • The pollution index in Potomac is 93% worse than the national average.

Compare Potomac, IL Weather To Other Cities

      vs

      Potomac 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.
      IndexPotomacIllinoisNational
      Air quality index364150
      Pollution index9,793,5403,347,2955,066,862

      Potomac air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality311
      Days with moderate air quality54
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Potomac air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.070%
      Carbon Tetrachloride0.010%
      Lead0.001%
      Mercury0.040%

      Average monthly Potomac temperature with heat index

      Potomac monthly precipitation with daily maximum

      Potomac monthly snow depth with daily maximum

      Potomac monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Bismarck, IL6113628%
      Henning, IL2433628%
      Oakwood, IL1,6663628%
      Rossville, IL1,6943628%
      Danville, IL32,0303628%
      Potomac, IL6753628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Waleska, GA675524%
      Malott, WA6752746%
      Barlow, KY6753628%
      Wright City, OK6753824%
      Junction City, CA6753824%
      Potomac, IL6753628%
      Source: The Potomac, 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.