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Weather in Decatur, Illinois, USA

Now
32 °F

Passing clouds.


Feels Like: 21 °F
Forecast: 40 / 27 °F
Wind: 17 mph from Southwest

Location: Decatur Airport
Current Time: Jan 21, 2026 at 5:38:31 am
Latest Report: Jan 21, 2026 at 4:54 am
Visibility: 10 mi
Pressure: 30.03 "Hg
Humidity: 45%
Dew Point: 13 °F
Location of DecaturLocation

Upcoming 5 hours

Now6:00 am7:00 am8:00 am9:00 am10:00 am
32 °F30 °F30 °F30 °F33 °F35 °F

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Forecast for the next 48 hours

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 WednesdayThursday
 NightMorningAfternoonEveningNightMorningAfternoon
Forecast
Temperature28 °F33 °F38 °F33 °F23 °F22 °F32 °F
Overcast.Scatt­erred clouds.Sunny.Overcast.Mostly clear.Overcast.Overcast.
Feels Like17 °F23 °F29 °F23 °F12 °F10 °F23 °F
Wind Speed16 mph14 mph15 mph14 mph10 mph12 mph10 mph
Wind DirectionS
SW
WSW
WSW
WNW
W
W
Humidity55%61%49%60%60%57%36%
Dew Point14 °F21 °F21 °F20 °F11 °F9 °F8 °F
Visibility8 mi6 mi8 mi5 mi6 mi7 mi8 mi
Probability of Precipitation0%0%0%5%0%0%0%
Amount of Rain0.00"0.00"0.00"0.00"0.00"0.00"0.00"
Amount of Snow0.00"0.00"0.00"0.00"0.00"0.00"0.00"
* Updated Wednesday, January 21, 2026 1:42:40 am Decatur time - Weather by CustomWeather, © 2026

14 day forecast, day-by-dayHour-by-hour forecast for next week

Yesterday's weather

Clear. 30 / 6 °F
Humidity: 50%. Wind: 11 mph from South

More weather last week

Currently at nearby stations

33 °F

Taylorville Municipal Airport: (29 mi)

Clear.

29 °F

University Of Illinois-Willard Airport: (38 mi)

Overcast.

30 °F

Bloomington / Normal: (44 mi)

Overcast.

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Forecast for the next 2 weeks

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SunMonTueWedThuFriSat
18
19
20

View historic weather

5
6
7

Detailed forecast for 14 days