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Flag Lake Weather Forecast
| REST OF THE AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 | | |  |  |  | |  |  |  | | |
| Showers | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Partly Sunny | Partly Cloudy | Mostly Sunny | Patchy Fog | Mostly Sunny | Patchy Fog |
| Hi: 57°FHi: 14°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C Lo: 40°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C |
| POP: 50% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 427 PM CDT Fri Sep 18 2026 
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Issued: 645 PM CDT Fri Sep 18 2026
Key Messages
- A period of moderate to heavy rainfall is expected through Saturday, with the heaviest rain occurring tonight. A 40 to 60 percent chance of rainfall exceeding 2 inches exists roughly south of a Marshfield to Appleton line.
- A Beach Hazards Statement and corresponding Small Craft Advisory has been issued late tonight into Saturday evening for areas south of Algoma.
- A quieter and drier weather pattern will settle into the region early to mid next week.
Discussion
... Issued at 129 PM CDT ...