TODAY JUN18
TEMPERATURE87
HUMIDITY68
PRESSURE30.11
WIND COND.240 10.3
  • 9272Tue20%40%
  • 8770Wed50%70%
  • 8269Thu60%
  • 8469Fri
  • 8469Sat
daynightWeather update from Robinson Municipal Airport at

Flat Rock 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
January-9°F106°F34°F0.1"
February-2°F68°F33°F0.3"
March14°F82°F45°F0.2"
April25°F90°F56°F1.2"
May32°F91°F65°F0.9"
June51°F95°F75°F0.5"
July52°F97°F75°F0.2"
August49°F99°F75°F0.0"
September37°F93°F68°F0.1"
October27°F91°F56°Fn/a
November14°F79°F45°F0.1"
December5°F72°F35°F0.5"

Did you know?

  • The highest monthly average temperature in Flat Rock for August is 75 degrees.
  • The lowest monthly average temperature in Flat Rock for February is 33 degrees.
  • The most monthly precipitation in Flat Rock occurs in April with 1.2 inches.
  • The air quality index in Flat Rock is 33% better than the national average.
  • The pollution index in Flat Rock is 90% better than the national average.

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Compare Flat Rock, IL Weather To Other Cities

Flat Rock 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.
IndexFlat RockIllinoisNational
Air quality index334150
Pollution index500,0043,347,2955,066,862

Flat Rock air quality information

MeasurementTotal
Days measured359
Days with good air quality347
Days with moderate air quality12
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Flat Rock air quality information

PollutantTotal
Arsenic0.001%
Benzene0.020%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Flat Rock temperature with heat index

Flat Rock monthly precipitation with daily maximum

Flat Rock monthly snow depth with daily maximum

Flat Rock monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Oblong, IL1,5713334%
Stoy, IL1303334%
Emison, IN1273334%
Bridgeport, IL1,4253334%
Palestine, IL1,2243334%
Flat Rock, IL3293334%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Lakeland Shores, MN3294412%
Custer City, OK3294216%
Kanarraville, UT3294118%
Westside, IA3294118%
Chandler, MN3293530%
Flat Rock, IL3293334%
Source: The Flat Rock, 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.