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September 2025 Climate Summary

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Joliet Regional Airport (KJOT)

Lat: 41.52°NLon: 88.18°WElev: 572ft.

Overcast

81°F

27°C

Humidity	51%
Wind Speed	Calm
Barometer	30.00 in
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	6 Oct 6:15 pm CDT

More Information:

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

Extended Forecast for

Manhattan IL

Tonight
Low: 59 °F
Showers
Likely
Tuesday
High: 61 °F
Chance
Showers
Tuesday Night
Low: 46 °F
Mostly Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 40 °F
Clear
Thursday
High: 65 °F
Sunny
Thursday Night
Low: 41 °F
Mostly Clear
Friday
High: 68 °F
Mostly Sunny
Friday Night
Low: 48 °F
Partly Cloudy

Detailed Forecast

Tonight

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 59. South southwest wind around 10 mph becoming north northwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday

A 40 percent chance of showers, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a steady temperature around 61. North wind around 10 mph, with gusts as high as 20 mph.

Tuesday Night

Mostly clear, with a low around 46. North wind around 5 mph, with gusts as high as 10 mph.

Wednesday

Sunny, with a high near 64. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

Wednesday Night

Clear, with a low around 40. East northeast wind around 5 mph, with gusts as high as 15 mph.

Thursday

Sunny, with a high near 65.

Thursday Night

Mostly clear, with a low around 41.

Friday

Mostly sunny, with a high near 68.