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Cheechako, IL Weather Forecast
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Cheechako Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | | |  |  | | |  |  | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Cloudy |
| Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C |
| POP: 70% | POP: 90% | POP: 80% | POP: 70% | POP: 50% | POP: 50% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 705 PM CDT Fri Sep 18 2026 
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Issued: 655 PM CDT Fri Sep 18 2026
Key Messages
- Periods of heavy rain and scattered thunderstorms late tonight through Sunday night. Localized flash flooding will be possible where the heaviest rains occur over the same areas. A Flood Watch for flash flooding is in effect for much of northern Illinois and far northwest Indiana late tonight through Saturday morning.
- Below normal temps early next week then dry weather expected mid/late next week.
Discussion
... Issued at 257 PM CDT Fri Sep 18 2026
An unseasonably strong mid-level ridge...