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Derby, Illinois Weather Forecast
Derby, Illinois Weather
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Weather Forecast for Derby, Illinois : Saline County
Issued: 9:32 pm CST Jan 18, 2026 Latitude: 37.6289374 Longitude: -88.385598 View on Google Maps

MouseOver for Detail Forecast
Tonight M.L.King Day Tuesday Wednesday Thursday Friday Saturday Sunday
Cloudy on Tonight Sunny on M.L.King Day Sunny on Tuesday 30% chance of rain & snow on Wednesday Sunny on Thursday Partly Sunny on Friday 20% chance of snow on Saturday 10% chance of freezing rain on Sunday
Low: 16°F High: 22°F High: 34°F High: 43°F High: 35°F High: 40°F High: 29°F High: 21°F
Low: 11°F Low: 26°F Low: 24°F Low: 22°F Low: 22°F Low: 10°F  
Cloudy Sunny Sunny Rain & Snow Sunny Partly Sunny Snow Freezing Rain
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
28°
Feels like 19°F
Cloudy
as of 9:15 PM CST
Rel. Humidity: 46%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.07 in.
Flight Rule: VFR
Wind Data
10 MPH
230° Southwest
Cloud Level(s): Solid Overcast at 5000ft
Current Conditions at
MARION - (KMWA)
28°
Cloudy
as of 9:15 PM CST
Rel. Humidity: 46%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.07 in.
Flight Rule: VFR
Wind Data
8 MPH
220° Southwest
Cloud Level(s): Solid Overcast at 5000ft
Current Conditions at
HENDERSON CITY - (KEHR)
27°
Feels like 15°F
Cloudy
as of 8:56 PM CST
Rel. Humidity: 58%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.07 in.
Flight Rule: VFR
Wind Data
13 MPH
230° Southwest
Cloud Level(s): Solid Overcast at 7000ft
Cloudy on Tonight Tonight... Partly cloudy, with a low around 16. Southwest wind 9 to 13 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Sunny on M.L.King Day M.L.King Day... Sunny, with a high near 22. Northwest wind 7 to 16 mph, with gusts as high as 28 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 11. West northwest wind around 5 mph becoming calm in the evening.
Sunny on Tuesday Tuesday... Sunny, with a high near 34. Calm wind becoming south southwest around 6 mph in the morning.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 26. South wind 5 to 11 mph, with gusts as high as 21 mph.
30% chance of rain & snow Wednesday Wednesday... A chance of rain and snow showers before noon, then a slight chance of rain showers. Partly sunny, with a high near 43. Southwest wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
20% chance of rain Wednesday Night Wednesday Night... A 20 percent chance of showers before midnight. Partly cloudy, with a low around 24. Southwest wind around 6 mph becoming northwest after midnight.
Sunny on Thursday Thursday... Sunny, with a high near 35. West northwest wind 3 to 6 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 22. Calm wind becoming south southwest around 6 mph after midnight.
Partly Sunny on Friday Friday... Partly sunny, with a high near 40. South southwest wind around 6 mph becoming north northeast in the afternoon.
20% chance of rain & snow Friday Night Friday Night... A chance of rain and snow showers. Mostly cloudy, with a low around 22. North northeast wind 6 to 9 mph.
20% chance of snow Saturday Saturday... A chance of snow showers. Mostly cloudy, with a high near 29. North northeast wind around 9 mph, with gusts as high as 18 mph.
20% chance of snow Saturday Night Saturday Night... A chance of snow showers. Mostly cloudy, with a low around 10. North wind around 9 mph.
10% chance of freezing rain Sunday Sunday... A slight chance of freezing rain. Mostly sunny, with a high near 21. North wind 6 to 8 mph.
Current Radar Image


Sun Almanac for Derby, Illinois
Sunrise: 07:06 AM
Sunset: 5:02 PM
Civil Sunrise:06:38 AM
Civil Sunset: 5:30 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 6:02 PM
Astro Sunrise: 05:34 AM
Astro Sunset: 6:34 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.