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Olmstead Park, IL Weather Forecast
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Olmstead Park Weather Forecast
| THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  | |  |  | |  |  |  |  |  | |
| Mostly Cloudy | Chance of Showers | Showers | Chance of T-Storm | Chance of T-Storm | Showers | Chance of Showers | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Mostly Clear |
| Hi: 71°FHi: 22°C | Lo: 61°FLo: 16°C | Hi: 69°FHi: 21°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C |
| POP: 40% | POP: 100% | POP: 70% | POP: 100% | POP: 90% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 121 PM CDT Tue Sep 29 2026 
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Instant definitions for any meteorological term.
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Issued: 126 PM CDT Tue Sep 29 2026
Key Messages
- Periods of rain are expected Tuesday night through Friday, with the greatest coverage on Thursday.
Discussion
... Issued at 335 AM CDT Tue Sep 29 2026
While slower than previous model guidance suggested, shallow fog is beginning to expand in coverage early this morning across portions of the area outside of Chicago, some of which is dense. The general expectation is for areas of fog to persist through the first part of the morning commute, with some fog potentially drifting into portion...