My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Heat Advisory
      until 7:00 PM CDT
      Elev 558 ft, 38.588 °N 89.899 °W

      O'Fallon, IL

      O'Fallon Station87°
      Updated: 9:44 AM CDT on September 9, 2026 (GMT -5)
      19 seconds ago
      96°
      72°
      87
      Feels Like 93
      Sunny
      N
      6
      Same temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Today
        Thu 09/10
        High 96°f
         56% Precip. / 0.13 in
        Partly cloudy with afternoon showers or thunderstorms. Storms may contain strong gusty winds. High 96F. Winds WSW at 5 to 10 mph. Chance of rain 60%.
        Tonight
        Thu 09/10
        Low 71°f
         83% Precip. / 1.17 in
        Scattered thunderstorms this evening becoming more widespread overnight. Storms may contain strong gusty winds. Low 71F. Winds light and variable. Chance of rain 80%. Rainfall near an inch.
        Tomorrow
        Fri 09/11
        High 77°f65°f
         93% Precip. / 0.2 in
        Thunderstorms in the morning will give way to cloudy skies late. Storms may contain strong gusty winds. High 77F. Winds NW at 5 to 10 mph. Chance of rain 90%.
        Hourly Forecast
        Now
        82°
        10AM
        83°
        11AM
        86°
        12PM
        88°
        1PM
        93°
        2PM
        46%
        95°
        3PM
        56%
        94°
        4PM
        43%
        89°
        5PM
        43%
        89°
        6PM
        45%
        86°
        7PM
        61%
        85°
        7:16PM
        Sunset
        8PM
        81°
        9PM
        79°
        10PM
        38%
        78°
        11PM
        51%
        76°
        12AM
        61%
        76°
        1AM
        75%
        75°
        2AM
        77%
        74°
        3AM
        79%
        74°
        4AM
        80%
        74°
        5AM
        71%
        73°
        6AM
        83%
        72°
        6:37AM
        Sunrise
        7AM
        94%
        72°
        8AM
        87%
        73°
        9AM
        61%
        73°
        Precipitation
        94%
        Thunderstorms possible after 2 PM
        Pollen
        Ragweed Pollen
        High
        Air Quality
        55
        Moderate
        UV Index
        3
        Moderate
        Additional Conditions
        1. Pressure 30.03 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point71°F
        5. Humidity 70%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KBLV Station History
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 96°F 85°F 98°F 1955
        4. Low 72°F 59°F 39°F 2024
        5. Rain/Snow Depth
        6. Precipitation 1.3 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 77°F 85°F 99°F
        4. Low 72°F 59°F 41°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:36 AM 7:17 PM
        3. Civil Twilight 6:09 AM 7:43 PM
        4. Nautical Twilight 5:37 AM 8:15PM
        5. Astronomical Twilight 5:04 AM 8:47 PM
        1. Length of Visible Light 13h 34m
        2. Length of Day 12h 41m
        3. Tomorrow will be 2 minutes 26 seconds shorter
        1. Moon 4:48 AM 6:33 PM
        2. Waning Crescent3% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        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