TODAY DEC19
TEMPERATURE33
HUMIDITY82
PRESSURE30.04
WIND COND.180 6.9
  • 4438Wed
  • 4230Thu40%20%
  • 3423Fri
  • 3524Sat
  • 3421Sun
daynightWeather update from Chicago / West Chicago, Dupage Airport at

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Sleepy Hollow 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
January16°F32°F24°F1.4"
February17°F34°F25°F1.2"
March30°F49°F38°F2.2"
April39°F62°F50°F3.8"
May49°F73°F60°F4.5"
June59°F82°F70°F4.4"
July63°F85°F74°F4.1"
August62°F83°F72°F3.8"
September54°F77°F65°F3.4"
October43°F64°F53°F3.1"
November32°F50°F40°F1.9"
December21°F36°F29°F2.1"

Did you know?

  • The highest monthly average temperature in Sleepy Hollow for July is 74 degrees.
  • The lowest monthly average temperature in Sleepy Hollow for January is 24 degrees.
  • The most monthly precipitation in Sleepy Hollow occurs in May with 4.5 inches.
  • The air quality index in Sleepy Hollow is 20% worse than the national average.
  • The pollution index in Sleepy Hollow is 89% better than the national average.

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Compare Sleepy Hollow, IL Weather To Other Cities

Sleepy Hollow 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.
IndexSleepy HollowIllinoisNational
Air quality index604150
Pollution index543,5163,347,2955,066,862

Sleepy Hollow air quality information

MeasurementTotal
Days measured365
Days with good air quality72
Days with moderate air quality281
Days w/ poor A.Q. for sensitive groups11
Days with unhealthy air quality1

Sleepy Hollow air quality information

PollutantTotal
Arsenic0.000%
Benzene0.004%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Sleepy Hollow temperature with heat index

Sleepy Hollow monthly precipitation with daily maximum

Sleepy Hollow monthly snow depth with daily maximum

Sleepy Hollow monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Burlington, IL6343138%
Gilberts, IL7,4793138%
Lake in the Hills, IL28,9083138%
Marengo, IL8,0813138%
Pingree Grove, IL5,9833138%
Sleepy Hollow, IL3,3386020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Camden, ME3,3383530%
East Rockingham, NC3,3383726%
Hurley, NY3,3373628%
Andrews AFB, MD3,336492%
Llano, TX3,3353628%
Sleepy Hollow, IL3,3386020%
Source: The Sleepy Hollow, 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.