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September 2025 Climate Summary

Current conditions at

Joliet Regional Airport (KJOT)

Lat: 41.52° N Lon: 88.18° W Elev: 572 ft.

Fair

89°F

32°C

Humidity	35%
Wind Speed	Calm
Barometer	30.13 in
Dewpoint	58°F (14°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	3 Oct 3:55 pm CDT

More Information:

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

Detailed forecast for

Southern Will

Tonight

Mostly clear. Lows in the mid 60s. South winds around 5 mph.

Saturday

Mostly sunny. Continued unseasonably warm with highs in the upper 80s. Southwest winds 5 to 10 mph.

Saturday Night

Clear. Lows in the lower 60s. South winds 5 to 10 mph.

Sunday

Sunny. Continued unseasonably warm with highs in the mid 80s. South winds 10 to 15 mph with gusts up to 25 mph.

Sunday Night

Clear. Lows in the lower 60s. South winds 5 to 10 mph.

Monday

Mostly sunny in the morning, then partly cloudy with a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of precipitation 30 percent.

Monday Night

Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the upper 50s. Chance of precipitation 70 percent.

Tuesday

Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning. Highs around 70. Chance of precipitation 40 percent.

Tuesday Night

Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 40s.

Wednesday

Sunny. Highs in the upper 60s.

Wednesday Night

Mostly clear. Lows in the mid 40s.

Thursday

Mostly sunny. Highs around 70.

Thursday Night

Partly cloudy. Lows in the upper 40s.