Herron Island, WA Weather - Forecast & Monthly Averages

TEMPERATURE	45
HUMIDITY	99
PRESSURE	100760
WIND COND.	89

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Weather Quick Facts

The highest monthly average temperature in Herron Island for August is 64.7 degrees
The lowest monthly average temperature in Herron Island for December is 40.5 degrees
The most monthly precipitation in Herron Island occurs in November with 6.8 inches
The air quality index in Herron Island is 50% better than the national average
The pollution index in Herron Island is 146% worse than the national average

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Herron 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	36°F	46°F	41°F	6.0"
February	38°F	49°F	43°F	4.2"
March	39°F	53°F	45°F	5.8"
April	42°F	58°F	49°F	3.1"
May	47°F	66°F	55°F	2.4"
June	51°F	71°F	59°F	1.3"
July	55°F	77°F	64°F	0.6"
August	55°F	77°F	65°F	0.8"
September	52°F	71°F	60°F	1.5"
October	47°F	60°F	52°F	4.5"
November	41°F	51°F	46°F	6.8"
December	36°F	45°F	40°F	5.8"

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Herron 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	Herron Island	Washington	National
Air quality index	21	36	42
Pollution index	6,704,330	4,541,850	2,726,193

Herron Island air quality

Measurement	Total
Days measured	361
Days with good air quality	339
Days with moderate air quality	22
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.003%
Benzene	0.100%
Carbon Tetrachloride	0.004%
Lead	0.030%
Mercury	0.003%

Average monthly Herron Island temperature with heat index

Herron Island monthly precipitation with daily maximum

Herron Island monthly snow depth with daily maximum

Herron Island monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Canterwood, WA	3,070	18	64.0%
Maplewood, WA	5,135	18	64.0%
Grapeview, WA	703	18	64.0%
Stansberry Lake, WA	2,389	18	64.0%
Rosedale, WA	4,389	18	64.0%
Herron Island, WA	50	21	58.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Tonopah, AZ	50	74	48.0%
Fish Camp, CA	50	50	= 100
Lookout, CA	50	29	42.0%
Idalia, CO	50	58	16.0%
Pine Island, FL	50	30	40.0%
Herron Island, WA	50	21	58.0%

Source: The Herron 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.