TODAY AUG14
TEMPERATURE68
HUMIDITY93
PRESSURE30.01
WIND COND.160 3.4
  • 866940%
  • 7868Wed60%60%
  • 8366Thu40%30%
  • 8467Fri
  • 8466Sat
daynightWeather update from Springfield - Abraham Lincoln Capital Airport at

Williamsville 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°F38°F29°F2.1"
February22°F41°F31°F1.9"
March34°F56°F44°F2.9"
April44°F68°F56°F4.3"
May54°F77°F65°F4.5"
June64°F86°F74°F5.5"
July66°F88°F77°F4.3"
August64°F86°F75°F3.2"
September57°F81°F68°F3.7"
October46°F69°F56°F3.7"
November36°F55°F45°F2.5"
December26°F41°F33°F2.8"

Did you know?

  • The highest monthly average temperature in Williamsville for July is 77 degrees.
  • The lowest monthly average temperature in Williamsville for January is 29 degrees.
  • The most monthly precipitation in Williamsville occurs in June with 5.5 inches.
  • The air quality index in Williamsville is 29% better than the national average.
  • The pollution index in Williamsville is 74% better than the national average.

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Compare Williamsville, IL Weather To Other Cities

Williamsville 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.
IndexWilliamsvilleIllinoisNational
Air quality index354150
Pollution index1,277,8903,347,2955,066,862

Williamsville air quality information

MeasurementTotal
Days measured365
Days with good air quality316
Days with moderate air quality49
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Williamsville air quality information

PollutantTotal
Arsenic0.010%
Benzene0.050%
Carbon Tetrachloride0.000%
Lead0.010%
Mercury0.002%

Average monthly Williamsville temperature with heat index

Williamsville monthly precipitation with daily maximum

Williamsville monthly snow depth with daily maximum

Williamsville monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Cantrall, IL1213530%
Dawson, IL5443530%
Jerome, IL1,6623530%
Middletown, IL3233530%
Sherman, IL4,4043530%
Williamsville, IL1,3463530%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Wauregan, CT1,3463334%
Fish Lake, IN1,346512%
Siesta Shores, TX1,3463824%
Santa Margarita, CA1,3465612%
Elverson, PA1,3474510%
Williamsville, IL1,3463530%
Source: The Williamsville, 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.