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Grignon Lake, WI Weather Forecast
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Grignon Lake Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  | |  |  |  | | |  |  |
| Mostly Clear | Partly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 60°FHi: 16°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C |
| POP: 40% | POP: 60% | POP: 50% | POP: 50% | POP: 30% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 452 AM CDT Thu Aug 27 2026 
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Issued: 648 AM CDT Thu Aug 27 2026
Key Messages
- Patchy ground fog this morning in north-central WI, and possibly again late tonight in central and north-central WI.
- Next chance of showers and storms arrives late Friday night into Saturday, continuing into early next week. Details are uncertain for greatest rain potential and storm intensity.
Discussion
... Issued at 225 AM CDT Thu Aug 27 2026
This morning...Dry and mostly clear skies prevailed across the region early this morning. However, patchy, shallow ground fog began to develop ...