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.

Thunderstorm Light Rain

72°F

22°C

Humidity 94%
Wind Speed SW 10 mph
Barometer 30.11 in (1019.1 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 14 Aug 9:54 am CDT
Extended Forecast for

Hammond IL

Flood Watch August 14, 10:48am until August 14, 04:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch August 14, 10:48am until August 14, 04:00pm

    NOW until 4:00pm Fri

    Flood Watch

  • Today

    High: 87 °F

    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 73. East wind around 7 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm. Mostly sunny, with a high near 91. Heat index values as high as 108. East southeast wind 7 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 30%.

    High: 91 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 74. West southwest wind around 7 mph.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 90. West northwest wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 30%.

    High: 90 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 69. North northwest wind 6 to 10 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 83. North wind 6 to 9 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms, mainly before 2pm. High near 87. East southeast wind 5 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. East wind around 7 mph. Chance of precipitation is 30%.
Saturday
A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm. Mostly sunny, with a high near 91. Heat index values as high as 108. East southeast wind 7 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 74. West southwest wind around 7 mph.
Sunday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 90. West northwest wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 69. North northwest wind 6 to 10 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 83. North wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hammond IL
 39.81°N 88.6°W (Elev. 673 ft)
Last Update:
10:41 am CDT Aug 14, 2026
Forecast Valid:
10am CDT Aug 14, 2026-6pm CDT Aug 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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