Weather World545 Reservoir, WI Weather Forecast
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545 Reservoir Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  |  |  |  | | | |  |  |
| Mostly Clear | Showers Likely | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Cloudy |
| Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C |
| POP: 70% | POP: 70% | POP: 50% | POP: 50% | POP: 40% | POP: 40% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 953 PM CDT Fri Aug 28 2026 
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Issued: 1034 PM CDT Fri Aug 28 2026
Key Messages
- Rain probabilities range from 60 to 90 percent on Saturday, with widespread rainfall amounts generally between 0.20 and 0.40 inches possible.
- Hazardous boating and swimming conditions on Lake Michigan from late Saturday night through Sunday evening.
- Becoming warmer and more humid late in the weekend into early next week with thunderstorms possible at times. While severe weather is not anticipated on Saturday, it is too early to determine if any of the storms would become severe from ...