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      Extreme Heat Warning
      until 8:00 PM CDT
      Elev 663 ft, 38.324 °N 90.144 °W

      Waterloo, IL

      Waterloo Station77°
      Updated: 6:54 AM CDT on September 4, 2026 (GMT -5)
      6 minutes ago
      99°
      73°
      77
      Feels Like 78
      Sunny
      N
      1
      Similar 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
        Sat 09/05
        High 99°f
         2% Precip. / 0 in
        Abundant sunshine. Very hot. High 99F. Winds light and variable.
        Tonight
        Sat 09/05
        Low 75°f
         5% Precip. / 0 in
        Clear skies. Low near 75F. Winds light and variable.
        Tomorrow
        Sun 09/06
        High 98°f72°f
         5% Precip. / 0 in
        Sunshine. Very hot. High 98F. Winds light and variable.
        Hourly Forecast
        Now
        74°
        7AM
        75°
        8AM
        79°
        9AM
        84°
        10AM
        89°
        11AM
        92°
        12PM
        94°
        1PM
        96°
        2PM
        97°
        3PM
        97°
        4PM
        97°
        5PM
        96°
        6PM
        95°
        7PM
        91°
        7:25PM
        Sunset
        8PM
        86°
        9PM
        83°
        10PM
        82°
        11PM
        81°
        12AM
        80°
        1AM
        79°
        2AM
        78°
        3AM
        77°
        4AM
        76°
        5AM
        76°
        6AM
        76°
        Precipitation
        5%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        47
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.96 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point71°F
        5. Humidity 89%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KCPS Station History
        Almanac for September 4, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 99°F 84°F 101°F 2011
        4. Low 73°F 63°F 43°F 1974
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.6 in -
        7. Snow 0 in 0 in -
        Almanac for September 5, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 98°F 84°F 100°F
        4. Low 73°F 63°F 41°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:32 AM 7:25 PM
        3. Civil Twilight 6:05 AM 7:52 PM
        4. Nautical Twilight 5:33 AM 8:24PM
        5. Astronomical Twilight 5:00 AM 8:57 PM
        1. Length of Visible Light 13h 46m
        2. Length of Day 12h 52m
        3. Tomorrow will be 2 minutes 24 seconds shorter
        1. Moon 11:58 PM 2:52 PM
        2. Last Quarter40% of the Moon is Illuminated
        Sep 4
        Waning Half Last Qtr
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Precipitation
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