Plymouth, IL Weather Forecast & Monthly Average Temperatures

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Plymouth 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	18°F	35°F	26°F	3.6"
February	19°F	38°F	27°F	3.0"
March	33°F	53°F	42°F	3.4"
April	43°F	67°F	54°F	5.4"
May	53°F	76°F	64°F	7.4"
June	63°F	84°F	73°F	10.8"
July	65°F	85°F	75°F	8.6"
August	63°F	84°F	73°F	8.8"
September	55°F	80°F	66°F	8.0"
October	44°F	68°F	55°F	8.3"
November	33°F	54°F	42°F	6.4"
December	23°F	38°F	30°F	5.1"

Did you know?

The highest monthly average temperature in Plymouth for July is 75 degrees.
The lowest monthly average temperature in Plymouth for January is 26 degrees.
The most monthly precipitation in Plymouth occurs in June with 10.8 inches.
The air quality index in Plymouth is 20% better than the national average.
The pollution index in Plymouth is 84% better than the national average.

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Compare Plymouth, IL Weather To Other Cities

Plymouth 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	Plymouth	Illinois	National
Air quality index	40	41	50
Pollution index	802,114	3,347,295	5,066,862

Plymouth air quality information

Measurement	Total
Days measured	110
Days with good air quality	71
Days with moderate air quality	39
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Plymouth air quality information

Pollutant	Total
Arsenic	0.001%
Benzene	0.040%
Carbon Tetrachloride	0.000%
Lead	0.000%
Mercury	0.000%

Average monthly Plymouth temperature with heat index

Plymouth monthly precipitation with daily maximum

Plymouth monthly snow depth with daily maximum

Plymouth monthly wind speed information

Nearby cities with good air quality

City, State	Population	Air Quality Index	National Avg.
Bowen, IL	470	34	32%
Augusta, IL	455	34	32%
Camden, IL	100	34	32%
Golden, IL	643	34	32%
West Point, IL	197	34	32%
Plymouth, IL	383	40	20%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
Jamestown, KS	383	32	36%
Rolling Hills, WY	383	39	22%
Ralston, OK	383	44	12%
South Toledo Bend, TX	383	435	770%
Platea, PA	383	48	4%
Plymouth, IL	383	40	20%

Source: The Plymouth, 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.