Rock Island, IL Weather - Forecast & Monthly Averages

TEMPERATURE	38
HUMIDITY	70
PRESSURE	101080
WIND COND.

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Weather Quick Facts

The highest monthly average temperature in Rock Island for July is 75.6 degrees
The lowest monthly average temperature in Rock Island for January is 24 degrees
The most monthly precipitation in Rock Island occurs in June with 6 inches
The air quality index in Rock Island is 9% worse than the national average
The pollution index in Rock Island is 47% worse than the national average

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Rock Island Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	15°F	34°F	24°F	1.5"
February	16°F	37°F	26°F	1.9"
March	29°F	53°F	40°F	2.8"
April	39°F	66°F	52°F	3.9"
May	49°F	76°F	63°F	4.3"
June	60°F	85°F	73°F	6.0"
July	64°F	88°F	76°F	5.3"
August	62°F	86°F	73°F	4.9"
September	54°F	81°F	66°F	3.4"
October	42°F	68°F	54°F	3.2"
November	31°F	54°F	42°F	2.1"
December	19°F	37°F	28°F	2.6"

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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.
Index	Rock Island	Illinois	National
Air quality index	46	41	42
Pollution index	4,003,130	3,148,694	2,726,193

Rock Island air quality

Measurement	Total
Days measured	365
Days with good air quality	217
Days with moderate air quality	145
Days w/ poor A.Q. for sensitive groups	3
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.170%
Benzene	0.050%
Carbon Tetrachloride	0.110%
Lead	0.020%
Mercury	0.010%

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	Population	Air Quality Index	National Avg.
Cordova, IL	685	42	16.0%
Princeton, IA	942	42	16.0%
Colona, IL	5,307	46	8.0%
Silvis, IL	7,507	46	8.0%
Coal Valley, IL	3,817	46	8.0%
Rock Island, IL	37,651	46	8.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Monrovia, CA	37,636	72	44.0%
Carpentersville, IL	37,618	55	10.0%
Menomonee Falls, WI	37,611	44	12.0%
Clinton, MD	37,765	47	6.0%
Egypt Lake-Leto, FL	37,775	43	14.0%
Rock Island, IL	37,651	46	8.0%

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.