TODAY OCT18
TEMPERATURE
HUMIDITY100
PRESSURE30.56
WIND COND.340 5.8
  • 5746Fri20%50%
  • 6231Sat
  • 5236Sun
  • 6240Mon
  • 6240Tue
daynightWeather update from St. Louis Regional Airport at
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Bethalto 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
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 Bethalto for July is 77 degrees.
  • The lowest monthly average temperature in Bethalto for January is 31 degrees.
  • The most monthly precipitation in Bethalto occurs in July with 7.3 inches.
  • The air quality index in Bethalto is 20% worse than the national average.
  • The pollution index in Bethalto is 67% worse than the national average.

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Compare Bethalto, IL Weather To Other Cities

Bethalto 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.
IndexBethaltoIllinoisNational
Air quality index604150
Pollution index8,473,0503,347,2955,066,862

Bethalto 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

Bethalto air quality information

PollutantTotal
Arsenic0.020%
Benzene0.070%
Carbon Tetrachloride0.020%
Lead0.010%
Mercury0.010%

Average monthly Bethalto temperature with heat index

Bethalto monthly precipitation with daily maximum

Bethalto monthly snow depth with daily maximum

Bethalto monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bunker Hill, IL1,7306020%
Edwardsville, IL25,0446020%
Hamel, IL1,0156020%
Marine, IL8726020%
Pontoon Beach, IL5,7536020%
Bethalto, IL9,3646020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Lamesa, TX9,3672648%
Bohemia, NY9,372476%
Merrill, WI9,3543628%
Mount Airy, MD9,376468%
North College Hill, OH9,351548%
Bethalto, IL9,3646020%
Source: The Bethalto, 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.