My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Air Quality Alert
      until 1:45 AM CDT
      Elev 558 ft, 38.798 °N 90.690 °W

      O'Fallon, MO

      O'Fallon Station80°

      Summary

      Temperature (°F) Actual Historic Avg. Record
      High Temp738398
      Low Temp736043
      Day Average Temp73--
      Precipitation (in) Actual Historic Avg. Record
      Precipitation03.4-
      Dew Point (°F) Actual Historic Avg. Record
      Dew Point66--
      High66--
      Low66--
      Average66--
      Wind (mph) Actual Historic Avg. Record
      Max Wind Speed0--
      Visibility10--
      Sea Level Pressure (in) Actual Historic Avg. Record
      Sea Level Pressure29.55--
      Astronomy Day Length Rise Set
      Actual Time12h 41m6:39 AM7:20 PM
      Civil Twilight6:12 AM7:47 PM
      Nautical Twilight5:40 AM8:18 PM
      Astronomical Twilight5:07 AM8:51 PM
      Moon: Waning crescent4:50 AM6:36 PM

      Daily Observations

      TimeTemperatureDew PointHumidityWindWind SpeedWind GustPressurePrecip.Condition
      12:54 AM 73 °F 66 °F 79 % CALM 0 mph - 29.55 in 0 in Fair
      Our AppsAbout UsContactCareersWeather Data APIs
      PWS NetworkWundermap
      Terms of UsePrivacy PolicyCookie NoticeAccessibility StatementAdChoicesData Vendors
      essentialaccessibility.com
      We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.
      Review All Privacy and Ad Settings
      Choose how my information is shared
      Data Rights
      The Weather Company The Weather Channel Weather Underground Storm Radar
      © The Weather Company, LLC 2026
      Glossary