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Jack Lake, WI Weather Forecast
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Jack Lake Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  |  |  | |  | | | | |
| Clearing | Clear | Showers Likely | Chance of T-Storm | Partly Sunny | Partly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Partly Cloudy | Chance of Showers | Partly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 35°FLo: 2°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Hi: 70°FHi: 21°C Lo: 49°FLo: 9°C |
| POP: 60% | POP: 100% | POP: 50% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 837 AM CDT Sun Sep 13 2026 
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Issued: 621 AM CDT Sun Sep 13 2026
Key Messages
- The first widespread frost of the season is expected across the north late tonight into early Monday morning. A few of the typical colder locations could drop to or slightly below freezing for a few hours.
- A round or two of heavy rain and storms is possible Monday into Tuesday. The severe weather threat is low.
- Hazardous conditions for small craft are likely Monday afternoon into Tuesday afternoon due to gusty southerly winds or high waves.
- High waves will lead to an increased risk ...