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Join NWS Central Illinois For An Open House on Saturday, August 29, 2026

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

79°F

26°C

Humidity	54%
Wind Speed	N 8 mph
Barometer	30.03 in (1016.5 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	17 Aug 5:54 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles SSE Bethany IL

Tonight
Low: 59 °F
Partly Cloudy
Tuesday
High: 82 °F
Mostly Sunny
Tuesday Night
Low: 66 °F
Partly Cloudy
then Chance
Showers
Wednesday
High: 81 °F
Showers
Likely
Wednesday Night
Low: 62 °F
Chance
Showers
Thursday
High: 80 °F
Mostly Sunny
Thursday Night
Low: 59 °F
Mostly Clear
Friday
High: 82 °F
Sunny
Friday Night
Low: 62 °F
Mostly Clear

Detailed Forecast

Tonight

Partly cloudy, with a low around 59. North northwest wind 5 to 8 mph becoming calm in the evening.

Tuesday

Mostly sunny, with a high near 82. Calm wind becoming west southwest around 5 mph in the afternoon.

Tuesday Night

A 40 percent chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 66. Light south wind.

Wednesday

A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Calm wind becoming south southwest around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

A 30 percent chance of showers. Mostly cloudy, with a low around 62. Northeast wind 3 to 5 mph.

Thursday

Mostly sunny, with a high near 80. Northeast wind around 6 mph.

Thursday Night

Mostly clear, with a low around 59. Light east northeast wind.

Friday

Sunny, with a high near 82.

Friday Night

Mostly clear, with a low around 62.

Saturday

Mostly sunny, with a high near 81.