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      Elev 591 ft, 39.846 °N 88.947 °W

      Decatur, IL

      Decatur Airport Station70°
      Updated: 5:09 AM CDT on September 19, 2026 (GMT -5)
      5 minutes ago
      88°
      70°
      70
      Feels Like 70
      Clear
      N
      7
      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
        Sat 09/19
        High 88°f
         9% Precip. / 0 in
        A mix of clouds and sun during the morning will give way to cloudy skies this afternoon. High 88F. Winds S at 5 to 10 mph.
        Tonight
        Sat 09/19
        Low 69°f
         9% Precip. / 0 in
        Some clouds. Low 69F. Winds SSW at 5 to 10 mph.
        Tomorrow
        Sun 09/20
        High 84°f63°f
         39% Precip. / 0.04 in
        Scattered thunderstorms developing during the afternoon. Storms may contain strong gusty winds. High 84F. Winds N at 10 to 15 mph. Chance of rain 40%.
        Hourly Forecast
        Now
        71°
        6AM
        71°
        6:40AM
        Sunrise
        7AM
        71°
        8AM
        74°
        9AM
        78°
        10AM
        81°
        11AM
        83°
        12PM
        85°
        1PM
        86°
        2PM
        86°
        3PM
        86°
        4PM
        87°
        5PM
        86°
        6PM
        84°
        6:57PM
        Sunset
        7PM
        82°
        8PM
        79°
        9PM
        78°
        10PM
        77°
        11PM
        76°
        12AM
        75°
        1AM
        75°
        2AM
        74°
        3AM
        73°
        4AM
        73°
        5AM
        72°
        Precipitation
        10%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        38
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.96 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point69°F
        5. Humidity 92%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KDEC Station History
        Almanac for September 19, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 88°F 77°F 97°F 1955
        4. Low 70°F 56°F 32°F 1901
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.2 in -
        7. Snow 0 in 0 in -
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 84°F 77°F 96°F
        4. Low 70°F 55°F 31°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:40 AM 6:57 PM
        3. Civil Twilight 6:13 AM 7:24 PM
        4. Nautical Twilight 5:41 AM 7:56PM
        5. Astronomical Twilight 5:09 AM 8:28 PM
        1. Length of Visible Light 13h 10m
        2. Length of Day 12h 16m
        3. Tomorrow will be 2 minutes 36 seconds shorter
        1. Moon 3:17 PM -
        2. Waxing Gibbous59% 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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