Rock Island, WA Weather - Forecast & Monthly Averages

TEMPERATURE	41
HUMIDITY	89
PRESSURE	100480
WIND COND.	280 9.4

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Weather Quick Facts

The highest monthly average temperature in Rock Island for July is 76.2 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 43% better than the national average
The pollution index in Rock Island is 84% better 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	24°F	35°F	29°F	0.8"
February	28°F	44°F	35°F	0.7"
March	34°F	55°F	43°F	0.9"
April	40°F	63°F	51°F	0.6"
May	48°F	74°F	60°F	1.0"
June	55°F	81°F	67°F	0.4"
July	63°F	91°F	76°F	0.2"
August	62°F	89°F	75°F	0.3"
September	53°F	79°F	65°F	0.3"
October	42°F	63°F	52°F	0.7"
November	32°F	47°F	38°F	0.9"
December	23°F	34°F	28°F	1.1"

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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	Washington	National
Air quality index	24	36	42
Pollution index	422,626	4,541,850	2,726,193

Rock Island air quality

Measurement	Total
Days measured	365
Days with good air quality	298
Days with moderate air quality	66
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.010%
Carbon Tetrachloride	0.001%
Lead	0.000%
Mercury	0.000%

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	Population	Air Quality Index	National Avg.
Wenatchee, WA	34,249	24	52.0%
East Wenatchee, WA	14,012	24	52.0%
Quincy, WA	7,815	24	52.0%
South Wenatchee, WA	1,351	24	52.0%
Sunnyslope, WA	3,761	24	52.0%
Rock Island, WA	1,240	24	52.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Wallace, LA	1,240	41	18.0%
Columbus, NC	1,240	44	12.0%
Lamèque, NB	1,240	n/a
St-Pierre-Jolys, MB	1,240	n/a
Manning, AB	1,240	n/a
Rock Island, WA	1,240	24	52.0%

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.