TODAY AUG15
TEMPERATURE75
HUMIDITY94
PRESSURE29.91
WIND COND.170 8.1
  • 8669Thu
  • 8467Fri50%70%
  • 8465Sat30%20%
  • 8568Sun
  • 8365Mon70%50%
daynightWeather update from St. Louis Regional Airport at

Brighton Average Weather

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
January24°F41°F31°F3.4"
February25°F43°F33°F3.7"
March38°F57°F46°F3.1"
April47°F68°F56°F6.6"
May56°F76°F65°F6.1"
June65°F85°F75°F3.5"
July67°F87°F77°F7.3"
August66°F86°F75°F6.8"
September58°F80°F68°F4.4"
October47°F68°F57°F6.7"
November36°F56°F45°F4.9"
December28°F43°F35°F6.3"

Did you know?

  • The highest monthly average temperature in Brighton for July is 77 degrees.
  • The lowest monthly average temperature in Brighton for January is 31 degrees.
  • The most monthly precipitation in Brighton occurs in July with 7.3 inches.
  • The air quality index in Brighton is 20% worse than the national average.
  • The pollution index in Brighton is 75% worse than the national average.

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Compare Brighton, IL Weather To Other Cities

Brighton 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.
IndexBrightonIllinoisNational
Air quality index604150
Pollution index8,870,2303,347,2955,066,862

Brighton air quality information

MeasurementTotal
Days measured365
Days with good air quality99
Days with moderate air quality231
Days w/ poor A.Q. for sensitive groups33
Days with unhealthy air quality2

Brighton air quality information

PollutantTotal
Arsenic0.180%
Benzene0.060%
Carbon Tetrachloride0.020%
Lead0.030%
Mercury0.120%

Average monthly Brighton temperature with heat index

Brighton monthly precipitation with daily maximum

Brighton monthly snow depth with daily maximum

Brighton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Chesterfield, IL3363530%
Bunker Hill, IL1,7306020%
Elsah, IL7466020%
Jerseyville, IL8,5026020%
Rosewood Heights, IL4,0116020%
Brighton, IL2,3166020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Watchtower, NY2,3163628%
South Roxana, IL2,3166020%
Pecatonica, IL2,3153138%
Trenton, FL2,3153334%
Fredonia, KS2,3172354%
Brighton, IL2,3166020%
Source: The Brighton, 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.