TODAY MAR06
TEMPERATURE25
HUMIDITY78
PRESSURE30.35
WIND COND.
  • 4219Sat
  • 4836Sun
  • 5840Mon
  • 6450Tue
  • 6343Wed
daynightWeather update from Rockford, Greater Rockford Airport at

Key findings

  • The highest monthly average temperature in Belvidere for July is 74 degrees
  • The lowest monthly average temperature in Belvidere for January is 23 degrees
  • The most monthly precipitation in Belvidere occurs in August with 5.3 inches
  • The air quality index in Belvidere is 16% better than the national average
  • The pollution index in Belvidere is 66% better than the national average

Compare Belvidere, IL Weather

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      Belvidere 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
      January14°F32°F23°F1.7"
      February15°F35°F25°F1.6"
      March27°F50°F38°F2.7"
      April37°F64°F50°F4.3"
      May47°F75°F61°F3.4"
      June58°F84°F71°F5.1"
      July62°F86°F74°F4.9"
      August61°F84°F72°F5.3"
      September53°F79°F65°F2.8"
      October42°F66°F53°F2.9"
      November30°F51°F40°F2.4"
      December18°F36°F27°F2.5"

      Belvidere 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.
      IndexBelvidereIllinoisNational
      Air quality index424150
      Pollution index1,721,0903,347,2955,066,862

      Belvidere air quality information

      MeasurementTotal
      Days measured341
      Days with good air quality240
      Days with moderate air quality100
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Belvidere air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly Belvidere temperature with heat index

      Belvidere monthly precipitation with daily maximum

      Belvidere monthly snow depth with daily maximum

      Belvidere monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Caledonia, IL2324216%
      Garden Prairie, IL1834216%
      Marengo, IL8,0814216%
      Roscoe, IL10,6664216%
      Genoa, IL4,9304216%
      Belvidere, IL25,3004216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ossining, NY25,299512%
      Yukon, OK25,293484%
      Salem, VA25,2903824%
      Immokalee, FL25,2843432%
      Columbine, CO25,2815816%
      Belvidere, IL25,3004216%
      Source: The Belvidere, 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.