| National Weather Service Forecast for:
Decatur IL Issued by: National Weather Service Lincoln, IL |
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| Updated: 5:37 am CST Feb 2, 2026 | ||||||||||||||||||
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| Today |
Mostly cloudy, with a high near 30. West wind 3 to 8 mph. |
| Tonight |
A 20 percent chance of snow after 3am. Mostly cloudy, with a low around 20. Light and variable wind. |
| Tuesday |
A 40 percent chance of snow before noon. Mostly cloudy, with a high near 29. North wind 5 to 8 mph. |
| Tuesday Night |
Partly cloudy, with a low around 10. North northeast wind 3 to 6 mph. |
| Wednesday |
Mostly sunny, with a high near 25. Light and variable wind becoming north northwest around 5 mph. |
| Wednesday Night |
Partly cloudy, with a low around 9. West wind 3 to 5 mph. |
| Thursday |
Partly sunny, with a high near 33. South southwest wind 5 to 10 mph, with gusts as high as 16 mph. |
| Thursday Night |
Partly cloudy, with a low around 26. |
| Friday |
Partly sunny, with a high near 38. |
| Friday Night |
Partly cloudy, with a low around 15. |
| Saturday |
Mostly sunny, with a high near 28. |
| Saturday Night |
Partly cloudy, with a low around 18. |
| Sunday |
Mostly sunny, with a high near 34. |
Forecast from NOAA-NWS for Decatur IL.