National Weather Service

News Headlines

August 11, 2026: Derecho produces widespread wind damage and tornadoes across northern Illinois and northwest Indiana

Hazardous Weather Conditions

Current conditions at

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Overcast

72°F

22°C

Humidity	100%
Wind Speed	S 6 mph
Barometer	30.09 in
Dewpoint	72°F (22°C)
Visibility	5.00 mi
Last update	15 Aug 6:15 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Kempton IL

Flood Watch August 15, 06:37am until August 15, 10:00am

Click here for hazard details and duration

...

Flood Watch August 15, 06:37am until August 15, 10:00am
NOW until 10:00am Sat
Flood Watch
Today
High: 84 °F
Heavy Rain
then Chance
Showers
Tonight
Low: 73 °F
Slight Chance
Showers then
Showers
Likely
Sunday
High: 85 °F
Showers
Likely then
Slight Chance
T-storms
Sunday Night
Low: 66 °F
Partly Cloudy
Monday
High: 81 °F
Mostly Sunny
Monday Night
Low: 62 °F
Mostly Clear
Tuesday
High: 83 °F
Mostly Sunny
Tuesday Night
Low: 68 °F
Mostly Cloudy
then Chance
Showers

Detailed Forecast

Today

Showers and possibly a thunderstorm before noon, then a chance of showers. Some of the storms could produce heavy rainfall. High near 84. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Tonight

A slight chance of showers before 2am, then a chance of showers and thunderstorms between 2am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 73. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

Showers and thunderstorms likely before 9am, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. West northwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Partly cloudy, with a low around 66. Northwest wind 5 to 10 mph.

Monday

Mostly sunny, with a high near 81. North wind around 5 mph.

Monday Night

Mostly clear, with a low around 62.

Tuesday

Mostly sunny, with a high near 83.

Tuesday Night

A chance of showers after 1am. Mostly cloudy, with a low around 68.

Wednesday

A chance of showers and thunderstorms. Mostly cloudy, with a high near 81.