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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Overcast

69°F

21°C

Humidity 100%
Wind Speed E 5 mph
Barometer 30.00 in
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 19 Sep 2:15 am CDT
Extended Forecast for

Pontiac Municipal Airport IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 67. Southeast wind around 5 mph, with gusts as high as 15 mph.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 11am. Cloudy, with a high near 83. Southeast wind around 5 mph becoming east northeast in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly between midnight and 4am, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 66. South southeast wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Sunday

    Sunday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 74. North northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 74 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. East northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Low: 56 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before 1pm. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 67. Southeast wind around 5 mph, with gusts as high as 15 mph.
Saturday
Showers and thunderstorms likely, mainly before 11am. Cloudy, with a high near 83. Southeast wind around 5 mph becoming east northeast in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely, mainly between midnight and 4am, then showers likely and possibly a thunderstorm after 4am. Cloudy, with a low around 66. South southeast wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 74. North northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. East northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Monday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Tuesday
A chance of showers before 1pm. Partly sunny, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
Partly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 73.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pontiac Municipal Airport IL
 40.93°N 88.62°W
Last Update:
2:31 am CDT Sep 19, 2026
Forecast Valid:
2am CDT Sep 19, 2026-6pm CDT Sep 25, 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