Weather World15 Reservoir, WI Weather Forecast
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15 Reservoir Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY |
 |  |  | |  | | |  | | | | |
| Mostly Clear | Mostly Sunny | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 49°FLo: 9°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 60°FLo: 16°C |
| POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 621 PM CDT Wed Aug 19 2026 
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15 Reservoir Forecast Discussion
Issued: 642 PM CDT Wed Aug 19 2026
Key Messages
- Dry and pleasant today.
- Thunderstorm potential returns Thursday evening into Friday morning with the main hazard being lightning.
- Seasonal temperatures in the 70s to lower 80s are forecast each afternoon over the next week.
Discussion
... Issued at 1240 PM CDT Wed Aug 19 2026
This Afternoon to Thursday Morning: Dry and Pleasant Conditions
A cooler, drier airmass will remain in place through the rest of today into Thursday morning over the Upper Midwest. Plea...