Forest Grove, OR Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Forest Grove for July is 67.8 degrees
The lowest monthly average temperature in Forest Grove for January is 38.5 degrees
The most monthly precipitation in Forest Grove occurs in December with 11.3 inches
The air quality index in Forest Grove is 10% better than the national average
The pollution index in Forest Grove is 456% worse than the national average

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Forest Grove 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	32°F	47°F	38°F	4.1"
February	33°F	53°F	42°F	3.0"
March	38°F	60°F	48°F	4.8"
April	39°F	61°F	50°F	2.9"
May	45°F	70°F	57°F	4.8"
June	48°F	72°F	59°F	2.1"
July	53°F	83°F	68°F	1.3"
August	51°F	84°F	67°F	1.2"
September	44°F	75°F	59°F	2.8"
October	42°F	61°F	50°F	3.8"
November	33°F	52°F	42°F	7.5"
December	33°F	45°F	39°F	11.3"

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Forest Grove 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	Forest Grove	Oregon	National
Air quality index	38	32	42
Pollution index	15,149,900	7,156,356	2,726,193

Forest Grove air quality

Measurement	Total
Days measured	365
Days with good air quality	285
Days with moderate air quality	77
Days w/ poor A.Q. for sensitive groups	3
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.010%
Benzene	0.160%
Carbon Tetrachloride	0.030%
Lead	0.080%
Mercury	0.010%

Average monthly Forest Grove temperature with heat index

Forest Grove monthly precipitation with daily maximum

Forest Grove monthly snow depth with daily maximum

Forest Grove monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Gaston, OR	526	38	24.0%
Hillsboro, OR	108,026	38	24.0%
Sherwood, OR	19,745	38	24.0%
Cedar Hills, OR	9,514	38	24.0%
Beaverton, OR	98,567	38	24.0%
Forest Grove, OR	24,847	38	24.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Denison, TX	24,851	325	550.0%
North Laurel, MD	24,856	46	8.0%
Burlington, IA	24,858	29	42.0%
Bainbridge Island, WA	24,859	45	10.0%
Ardmore, OK	24,834	43	14.0%
Forest Grove, OR	24,847	38	24.0%

Source: The Forest Grove, OR 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.