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October 2026 Climate Summary

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

53°F

12°C

Humidity	74%
Wind Speed	W 13 mph
Barometer	29.85 in (1010.9 mb)
Dewpoint	45°F (7°C)
Visibility	10.00 mi
Wind Chill	49°F (9°C)
Last update	5 Nov 10:54 am CST

More Information:

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

Extended Forecast for

3 Miles ESE Harristown IL

Today
High: 57 °F
Chance
Drizzle
Tonight
Low: 39 °F
Chance
Drizzle
Friday
High: 50 °F
Gradual
Clearing
Friday Night
Low: 28 °F
Mostly Clear
Saturday
High: 52 °F
Mostly Sunny
Saturday Night
Low: 31 °F
Mostly Clear
Sunday
High: 59 °F
Sunny
Sunday Night
Low: 34 °F
Clear
Monday
High: 64 °F
Sunny

Detailed Forecast

Today

A chance of drizzle, mainly after 5pm. Cloudy, with a high near 57. West wind 9 to 15 mph, with gusts as high as 21 mph.

Tonight

A chance of drizzle between 10pm and 2am. Cloudy, with a low around 39. West wind 7 to 13 mph becoming north northwest after midnight. Winds could gust as high as 17 mph.

Friday

Cloudy through mid morning, then gradual clearing, with a high near 50. North northwest wind 7 to 14 mph, with gusts as high as 18 mph.

Friday Night

Mostly clear, with a low around 28. North northwest wind around 6 mph becoming calm in the evening.

Saturday

Mostly sunny, with a high near 52. Calm wind becoming northwest around 5 mph.

Saturday Night

Mostly clear, with a low around 31. Light west wind.

Sunday

Sunny, with a high near 59. Calm wind becoming west 5 to 8 mph in the morning.

Sunday Night

Clear, with a low around 34.