Princeton, IL Weather - Forecast & Monthly Averages

TEMPERATURE	41
HUMIDITY	90
PRESSURE	101630
WIND COND.	290 18.4

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Weather Quick Facts

The highest monthly average temperature in Princeton for July is 75.2 degrees
The lowest monthly average temperature in Princeton for January is 25.7 degrees
The most monthly precipitation in Princeton occurs in August with 8.2 inches
The air quality index in Princeton is 100% better than the national average
The pollution index in Princeton is 23% better than the national average

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Princeton 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	34°F	26°F	3.3"
February	19°F	35°F	26°F	3.0"
March	32°F	51°F	40°F	4.3"
April	42°F	64°F	52°F	7.2"
May	53°F	75°F	63°F	8.0"
June	62°F	83°F	72°F	7.5"
July	66°F	85°F	75°F	7.1"
August	64°F	83°F	73°F	8.2"
September	56°F	78°F	66°F	6.3"
October	45°F	65°F	54°F	6.6"
November	34°F	51°F	42°F	4.3"
December	23°F	37°F	30°F	3.5"

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Princeton 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	Princeton	Illinois	National
Air quality index	0	41	42
Pollution index	2,097,740	3,148,694	2,726,193

Princeton air quality

Measurement	Total
Days measured	335
Days with good air quality	334
Days with moderate air quality	1
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.060%
Carbon Tetrachloride	0.000%
Lead	0.001%
Mercury	0.300%

Average monthly Princeton temperature with heat index

Princeton monthly precipitation with daily maximum

Princeton monthly snow depth with daily maximum

Princeton monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
La Moille, IL	801	0	100.0%
Cherry, IL	479	0	100.0%
Ohio, IL	509	0	100.0%
De Pue, IL	1,724	0	100.0%
Spring Valley, IL	5,172	0	100.0%
Princeton, IL	7,589	0	100.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Corning, CA	7,589	41	18.0%
Yreka, CA	7,589	36	28.0%
Sioux Center, IA	7,592	35	30.0%
Clear Lake, IA	7,594	15	70.0%
Glen Ridge, NJ	7,583	51	2.0%
Princeton, IL	7,589	0	100.0%

Source: The Princeton, 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.