TODAY MAY13
TEMPERATURE44
HUMIDITY69
PRESSURE30.42
WIND COND.
  • 6645Thu
  • 6849Fri
  • 6552Sat40%
  • 6857Sun50%70%
  • 7256Mon50%40%
daynightWeather update from Illinois Valley Regional Airport at

Key findings

  • 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 59% better than the national average

Compare Princeton, IL Weather

      vs
      How would you rate the weather in Princeton?
      Write a review to give others more information about this area.
      How would you rate the air quality in Princeton?
      Write a review to give others more information about this area.
      See all Princeton poll results

      Princeton Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January18°F34°F26°F3.3"
      February19°F35°F26°F3.0"
      March32°F51°F40°F4.3"
      April42°F64°F52°F7.2"
      May53°F75°F63°F8.0"
      June62°F83°F72°F7.5"
      July66°F85°F75°F7.1"
      August64°F83°F73°F8.2"
      September56°F78°F66°F6.3"
      October45°F65°F54°F6.6"
      November34°F51°F42°F4.3"
      December23°F37°F30°F3.5"

      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.
      IndexPrincetonIllinoisNational
      Air quality index04150
      Pollution index2,097,7403,347,2955,066,862

      Princeton air quality information

      MeasurementTotal
      Days measured335
      Days with good air quality334
      Days with moderate air quality1
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Princeton air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.060%
      Carbon Tetrachloride0.000%
      Lead0.001%
      Mercury0.300%

      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, StatePopulationAir Quality IndexNational Avg.
      Arlington, IL1990100%
      McNabb, IL3050100%
      Bureau Junction, IL2190100%
      Mark, IL5300100%
      Hollowayville, IL520100%
      Princeton, IL7,7410100%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Wading River, NY7,7424314%
      Quincy, FL7,7434020%
      Three Rivers, MI7,7433824%
      Lander, WY7,7444510%
      Southwest Ranches, FL7,7454118%
      Princeton, IL7,7410100%
      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.