TODAY AUG21
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 8364Sat20%
  • 8466Sun
  • 8065Mon30%
  • 7759Tue
  • 7656Wed
daynightWeather update from Danville, Vermilion County Airport at

Potomac Average Weather

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 27% better than the national average.
  • The pollution index in Potomac is 93% worse than the national average.

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Compare Potomac, IL Weather To Other Cities

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.
Fithian, IL4683628%
Loda, IL3153628%
Penfield, IL1513628%
St. Joseph, IL4,1093628%
Alvan, IL3083628%
Potomac, IL6753628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Junction City, CA6753824%
Wright City, OK6753824%
Wilton Center, CT675476%
Aroma Park, IL6756020%
Brookfield, MA6753824%
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.