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

Areas of Excessive Rainfall and Extreme Heat; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding Tuesday. Hot to extremely hot temperatures are in place through Tuesday across much of the western U.S. and northern New England. Tropical Storm Erin is forecast to become a Major Hurricane by this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Thunderstorm in Vicinity

78°F

26°C

Humidity 87%
Wind Speed S 5 mph
Barometer 29.99 in
Dewpoint 74°F (23°C)
Visibility 7.00 mi
Heat Index80°F (27°C)
Last update 11 Aug 7:55 pm CDT
Extended Forecast for

Forrest IL

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 70. South wind around 5 mph. Chance of precipitation is 50%.

    Low: 70 °F

    Scattered
    T-storms

  • Tuesday

    Tuesday: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Scattered
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. West wind around 5 mph.

    Low: 68 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Northwest wind around 5 mph.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. North northwest wind around 5 mph becoming calm.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Tonight
Scattered showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 70. South wind around 5 mph. Chance of precipitation is 50%.
Tuesday
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. West wind around 5 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Northwest wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 61. North northwest wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 71.
Saturday
Sunny, with a high near 91.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 68.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forrest IL
 40.75°N 88.42°W
Last Update:
8:06 pm CDT Aug 11, 2025
Forecast Valid:
8pm CDT Aug 11, 2025-6pm CDT Aug 18, 2025
 
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