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

Hazardous Weather Conditions

Current conditions at

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Fair

88°F

31°C

Humidity 82%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 82°F (28°C)
Visibility 10.00 mi
Heat Index108°F (42°C)
Last update 26 Jul 10:55 am CDT
Extended Forecast for

New Haven IL

Heat Advisory until July 28, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 28, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Today

    High: 94 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then a slight chance of showers between 4am and 5am. Mostly clear, with a low around 75. Light south southwest wind. Chance of precipitation is 60%.

    Low: 75 °F

    Showers
    Likely

  • Monday

    Monday: A 10 percent chance of showers before 7am. Mostly sunny and hot, with a high near 98. Heat index values as high as 111. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 98 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South southwest wind around 9 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Northwest wind 6 to 10 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68. North northeast wind 5 to 8 mph.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 88. North wind 3 to 8 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 65. North wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Clear

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 105. Light and variable wind.
Tonight
Showers and thunderstorms likely before 4am, then a slight chance of showers between 4am and 5am. Mostly clear, with a low around 75. Light south southwest wind. Chance of precipitation is 60%.
Monday
A 10 percent chance of showers before 7am. Mostly sunny and hot, with a high near 98. Heat index values as high as 111. Light and variable wind becoming south 5 to 9 mph in the morning.
Monday Night
Mostly clear, with a low around 78. South southwest wind around 9 mph.
Tuesday
Sunny, with a high near 94. Northwest wind 6 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 68. North northeast wind 5 to 8 mph.
Wednesday
Sunny, with a high near 88. North wind 3 to 8 mph.
Wednesday Night
Clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 88. Calm wind becoming east northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 66. Calm wind.
Friday
A slight chance of showers. Mostly sunny, with a high near 88. Light and variable wind.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Light and variable wind.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming north 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
New Haven IL
 37.9°N 88.12°W
Last Update:
9:51 am CDT Jul 26, 2026
Forecast Valid:
11am CDT Jul 26, 2026-6pm CDT Aug 1, 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