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      Elev 676 ft, 39.887 °N 88.977 °W

      Decatur, IL

      Sims Station77°
      Updated: 3:31 AM CDT on September 9, 2026 (GMT -5)
      6 minutes ago
      88°
      70°
      77
      Feels Like 78
      Clear
      N
      7
      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
        Thu 09/10
        High 88°f
         47% Precip. / 0.08 in
        Mixed clouds and sun this morning. Scattered thunderstorms developing this afternoon. Storms may contain strong gusty winds. High 88F. Winds W at 5 to 10 mph. Chance of rain 50%.
        Tonight
        Thu 09/10
        Low 69°f
         59% Precip. / 0.32 in
        Variable clouds with scattered thunderstorms. Storms may contain strong gusty winds. Low 69F. Winds NW at 5 to 10 mph. Chance of rain 60%.
        Tomorrow
        Fri 09/11
        High 76°f59°f
         53% Precip. / 0.12 in
        Rain showers early with overcast skies later in the day. Expect mist and reduced visibilities at times. High 76F. Winds N at 5 to 10 mph. Chance of rain 50%.
        Hourly Forecast
        Now
        77°
        4AM
        77°
        5AM
        76°
        6AM
        75°
        6:31AM
        Sunrise
        7AM
        74°
        8AM
        76°
        9AM
        79°
        10AM
        82°
        11AM
        84°
        12PM
        86°
        1PM
        88°
        2PM
        88°
        3PM
        88°
        4PM
        86°
        5PM
        48%
        85°
        6PM
        83°
        7PM
        31%
        80°
        7:14PM
        Sunset
        8PM
        35%
        77°
        9PM
        75°
        10PM
        35%
        73°
        11PM
        38%
        73°
        12AM
        32%
        72°
        1AM
        36%
        71°
        2AM
        59%
        71°
        3AM
        51%
        71°
        Precipitation
        59%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        53
        Moderate
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point64°F
        5. Humidity 64%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KDEC Station History
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 88°F 80°F 100°F 1983
        4. Low 70°F 60°F 39°F 1986
        5. Rain/Snow Depth
        6. Precipitation 0.4 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 76°F 80°F 99°F
        4. Low 70°F 59°F 40°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:31 AM 7:14 PM
        3. Civil Twilight 6:04 AM 7:41 PM
        4. Nautical Twilight 5:31 AM 8:13PM
        5. Astronomical Twilight 4:58 AM 8:47 PM
        1. Length of Visible Light 13h 37m
        2. Length of Day 12h 42m
        3. Tomorrow will be 2 minutes 34 seconds shorter
        1. Moon 4:41 AM 6:31 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
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