National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

66°F

19°C

Humidity 81%
Wind Speed SW 8 mph
Barometer 30.05 in (1017.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 25 Jul 3:54 am CDT
Extended Forecast for

2 Miles NNW Moweaqua IL

Heat Advisory July 26, 12:00pm until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: A 40 percent chance of showers. Cloudy, with a low around 66. South wind around 5 mph.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 81. South wind 5 to 8 mph.

    High: 81 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 70. Southeast wind 3 to 5 mph.

    Low: 70 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 91. Heat index values as high as 105. Light and variable wind becoming southwest 5 to 7 mph in the afternoon.

    High: 91 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. South southwest wind 3 to 6 mph.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 95. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Southwest wind 6 to 10 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers. Cloudy, with a low around 66. South wind around 5 mph.
Saturday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 81. South wind 5 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 70. Southeast wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 91. Heat index values as high as 105. Light and variable wind becoming southwest 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 73. South southwest wind 3 to 6 mph.
Monday
Mostly sunny and hot, with a high near 95. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 74. Southwest wind 6 to 10 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Moweaqua IL
 39.65°N 89.04°W (Elev. 607 ft)
Last Update:
3:16 am CDT Jul 25, 2026
Forecast Valid:
3am CDT Jul 25, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation