TODAY JUN20
TEMPERATURE75
HUMIDITY94
PRESSURE29.89
WIND COND.
  • 8064Wed50%60%
  • 7563Thu60%60%
  • 7261Fri70%40%
  • 7862Sat20%20%
  • 8061Sun20%20%
daynightWeather update from Moline, Quad-City Airport at

Rock Island 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-29°F63°F25°F1.6"
February-8°F62°F27°F1.5"
March7°F81°F40°F3.3"
April19°F89°F52°F3.4"
May25°F95°F62°F3.4"
June46°F98°F73°F4.1"
July50°F103°F75°F5.5"
August45°F98°F74°F5.5"
September36°F94°F66°F3.3"
October24°F95°F54°F2.8"
November13°F75°F43°F1.3"
December-10°F59°F26°F2.8"

Did you know?

  • The highest monthly average temperature in Rock Island for July is 75 degrees.
  • The lowest monthly average temperature in Rock Island for January is 25 degrees.
  • The most monthly precipitation in Rock Island occurs in July with 5.5 inches.
  • The air quality index in Rock Island is 10% worse than the national average.
  • The pollution index in Rock Island is 20% better than the national average.

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Compare Rock Island, IL Weather To Other Cities

Rock Island 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.
IndexRock IslandIllinoisNational
Air quality index554150
Pollution index4,003,1303,347,2955,066,862

Rock Island air quality information

MeasurementTotal
Days measured365
Days with good air quality137
Days with moderate air quality225
Days w/ poor A.Q. for sensitive groups3
Days with unhealthy air quality

Rock Island air quality information

PollutantTotal
Arsenic0.170%
Benzene0.050%
Carbon Tetrachloride0.110%
Lead0.020%
Mercury0.010%

Average monthly Rock Island temperature with heat index

Rock Island monthly precipitation with daily maximum

Rock Island monthly snow depth with daily maximum

Rock Island monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Cordova, IL645536%
Princeton, IA1,100536%
Bettendorf, IA35,0485510%
Donahue, IA3855510%
Maysville, IA1595510%
Rock Island, IL38,6475510%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Muskogee, OK38,6052158%
Hurst, TX38,690548%
Stanton, CA38,5947448%
South Miami Heights, FL38,7364118%
Kailua, HI38,5143040%
Rock Island, IL38,6475510%
Source: The Rock Island, 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.