Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

69°F

21°C

Humidity 66%
Wind Speed SE 9 mph
Barometer 29.92 in (1012.7 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 21 Jun 8:54 am CDT
Extended Forecast for

Hammond IL

Flood Watch until June 22, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until June 22, 01:00am

    NOW until 1:00am Mon

    Flood Watch

  • Today

    High: 74 °F

    Heavy Rain

  • Tonight

    Tonight: A chance of showers and thunderstorms. Some of the storms could produce heavy rainfall.  Cloudy, with a low around 59. South southeast wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 23 mph.  Chance of precipitation is 50%.

    Low: 59 °F

    Heavy Rain
    then Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 9am.  Mostly cloudy, with a high near 73. North wind around 15 mph, with gusts as high as 22 mph.

    High: 73 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. North northeast wind 6 to 11 mph, with gusts as high as 15 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. North northeast wind 3 to 6 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Light and variable wind.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. Light and variable wind becoming southwest 5 to 7 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms, mainly after 1pm. Some of the storms could produce heavy rainfall. High near 74. Southeast wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Tonight
A chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Cloudy, with a low around 59. South southeast wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 50%.
Monday
A 20 percent chance of showers before 9am. Mostly cloudy, with a high near 73. North wind around 15 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 53. North northeast wind 6 to 11 mph, with gusts as high as 15 mph.
Tuesday
Sunny, with a high near 77. North northeast wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 57. Light and variable wind.
Wednesday
Mostly sunny, with a high near 79. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 59.
Friday
A chance of showers. Mostly sunny, with a high near 80.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Hammond IL
 39.81°N 88.6°W (Elev. 673 ft)
9:16 am CDT Jun 21, 2026
9am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
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