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Walnut Creek, IL Weather Forecast
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Walnut Creek Weather Forecast
| OVERNIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  |  | | | | | | | |
| Chance of Rain | Clearing | Patchy Fog | Sunny | Mostly Clear | Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Partly Cloudy |
| Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 40°FLo: 4°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C |
| POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1156 PM CDT Thu Oct 01 2026 
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Issued: 1221 AM CDT Fri Oct 2 2026
Key Messages
- Locally heavy rainfall could result in some isolated flooding through mid-late evening.
- Chilliest night of the fall is expected Friday night with widespread lows in the 40s away from the Chicago urban heat island.
- Extended period of dry, pleasant fall weather expected Friday through potentially all of next week.
Discussion
... Issued at 100 PM CDT Thu Oct 1 2026
Earlier discussion regarding this afternoon and evening`s heavy rain threat (issued at 952 AM)...
Have opted to issue a flood w...