TODAY AUG14
TEMPERATURE70
HUMIDITY39
PRESSURE29.99
WIND COND.300 9.2
  • 9466Tue
  • 9867Wed
  • 9765Thu
  • 9465Fri
  • 9566Sat
daynightWeather update from Wenatchee, Pangborn Memorial 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
January24°F35°F29°F0.8"
February28°F44°F35°F0.7"
March34°F55°F43°F0.9"
April40°F63°F51°F0.6"
May48°F74°F60°F1.0"
June55°F81°F67°F0.4"
July63°F91°F76°F0.2"
August62°F89°F75°F0.3"
September53°F79°F65°F0.3"
October42°F63°F52°F0.7"
November32°F47°F38°F0.9"
December23°F34°F28°F1.1"

Did you know?

  • The highest monthly average temperature in Rock Island for July is 76 degrees.
  • The lowest monthly average temperature in Rock Island for December is 28 degrees.
  • The most monthly precipitation in Rock Island occurs in December with 1.1 inches.
  • The air quality index in Rock Island is 45% better than the national average.
  • The pollution index in Rock Island is 91% better than the national average.

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Compare Rock Island, WA 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 IslandWashingtonNational
Air quality index273650
Pollution index422,6268,596,9895,066,862

Rock Island air quality information

MeasurementTotal
Days measured365
Days with good air quality275
Days with moderate air quality90
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Rock Island air quality information

PollutantTotal
Arsenic0.000%
Benzene0.010%
Carbon Tetrachloride0.001%
Lead0.000%
Mercury0.000%

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.
Quincy, WA7,2482746%
South Wenatchee, WA1,8142746%
Sunnyslope, WA3,6502746%
East Wenatchee, WA13,5892746%
Wenatchee, WA33,2572746%
Rock Island, WA9172746%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Harwick, PA9175612%
Silverdale, PA917476%
Norwich, VT9173432%
Jarrell, TX9173628%
Orleans, VT9173628%
Rock Island, WA9172746%
Source: The Rock Island, WA 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.