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      Elev 558 ft, 38.588 °N 89.899 °W

      O'Fallon, IL

      O'Fallon Station74°
      Updated: 2:23 PM CDT on September 21, 2026 (GMT -5)
      2 minutes ago
      74°
      63°
      74
      Feels Like 75
      Cloudy
      N
      8
      Lower 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
        Mon 09/21
        High 72°f
         15% Precip. / 0 in
        Cloudy skies. A stray shower or thunderstorm is possible. High 72F. Winds NNE at 5 to 10 mph.
        Tonight
        Mon 09/21
        Low 60°f
         10% Precip. / 0 in
        Cloudy skies. Low around 60F. Winds NNE at 5 to 10 mph.
        Tomorrow
        Tue 09/22
        High 71°f58°f
         9% Precip. / 0 in
        Cloudy. High 71F. Winds NNE at 5 to 10 mph.
        Hourly Forecast
        Now
        71°
        3PM
        72°
        4PM
        72°
        5PM
        72°
        6PM
        72°
        6:58PM
        Sunset
        7PM
        70°
        8PM
        68°
        9PM
        67°
        10PM
        66°
        11PM
        65°
        12AM
        65°
        1AM
        64°
        2AM
        64°
        3AM
        64°
        4AM
        63°
        5AM
        63°
        6AM
        62°
        6:47AM
        Sunrise
        7AM
        61°
        8AM
        62°
        9AM
        64°
        10AM
        66°
        11AM
        67°
        12PM
        68°
        1PM
        69°
        2PM
        70°
        Precipitation
        15%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        14
        Good
        UV Index
        2
        Low
        Additional Conditions
        1. Pressure 29.99 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point69°F
        5. Humidity 92%
        6. Rainfall 0.93 in
        7. Snow Depth 0 in
         KBLV Station History
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 74°F 82°F 97°F 2022
        4. Low 63°F 55°F 31°F 1991
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.1 in -
        7. Snow 0 in 0 in -
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 71°F 82°F 97°F
        4. Low 63°F 55°F 36°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:46 AM 6:58 PM
        3. Civil Twilight 6:20 AM 7:24 PM
        4. Nautical Twilight 5:49 AM 7:55PM
        5. Astronomical Twilight 5:17 AM 8:26 PM
        1. Length of Visible Light 13h 4m
        2. Length of Day 12h 11m
        3. Tomorrow will be 2 minutes 28 seconds shorter
        1. Moon 4:32 PM 1:22 AM
        2. Waxing Gibbous77% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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