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Koller Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  |  | |  |  |  | | | |
| Partly Cloudy | Partly Sunny | Partly Cloudy | Chance of Showers | Mostly Clear | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Rain Showers | Chance of T-Storm | Chance of Showers | Chance of T-Storm |
| Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 70°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | |
| POP: 40% | POP: 20% | POP: 80% | POP: 60% | POP: 50% | POP: 70% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 430 AM CDT Sat Sep 12 2026 
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Issued: 654 AM CDT Sat Sep 12 2026
Key Messages
- A few showers are slowly progressing eastward this morning. An isolated bolt of lightning is possible but not likely.
- Active start to next week, with multiple periods of showers and thunderstorms expected Monday evening through at least Tuesday. Some storms could produce heavy rainfall and some gusty winds.
- Gales are possible later Monday into Tuesday across the Lake Michigan open waters. A Small Craft Advisory may eventually be needed Monday into Tuesday for the nearshore waters.