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September 2025 Climate Summary

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93° N Lon: 88.71° W Elev: 909 ft.

Partly Cloudy

87°F

31°C

Humidity	35%
Wind Speed	SW 7 mph
Barometer	30.16 in
Dewpoint	56°F (13°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	3 Oct 2:15 pm CDT

More Information:

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

Detailed forecast for

McHenry County

Rest Of Today

Sunny. Near record breaking warmth likely. Highs in the upper 80s. Southwest winds 5 to 10 mph.

Tonight

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

Saturday

Sunny. Continued unseasonably warm with highs in the upper 80s. Southwest winds 5 to 10 mph, increasing to south 10 to 15 mph in the afternoon.

Saturday Night

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

Sunday

Sunny. Continued unseasonably warm with highs in the mid 80s. South winds 10 to 15 mph, increasing to 15 to 20 mph in the afternoon.

Sunday Night

Mostly clear. Lows in the lower 60s.

Monday

Partly cloudy in the morning, then becoming mostly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the upper 70s. Chance of precipitation 40 percent.

Monday Night

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

Tuesday

Mostly cloudy. A chance of showers in the morning. Highs in the upper 60s. Chance of precipitation 40 percent.

Tuesday Night

Mostly clear. Lows in the mid 40s.

Wednesday

Sunny. Highs in the mid 60s.

Wednesday Night

Mostly clear. Lows in the lower 40s.

Thursday

Mostly sunny. Highs in the mid 60s.