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Thirtyone Lake Weather Forecast
| REST OF TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY |
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| Sunny | Clear | Sunny | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of T-Storm |
| Hi: 71°FHi: 22°C | Lo: 41°FLo: 5°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C |
| POP: 20% | POP: 60% | POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1051 AM CDT Tue Aug 18 2026 
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Thirtyone Lake Forecast Discussion
Issued: 1200 PM CDT Tue Aug 18 2026
Key Messages
- Dry weather today through Wednesday for nearly all.
- Scattered showers and non-severe storms forecast Thursday into Friday. A few strong thunderstorms are possible Thursday for the Brainerd Lakes into east-cental MN and far western WI.
- Additional chances for scattered shower and thunderstorms next Monday and Tuesday.
Discussion
... Issued at 1155 AM CDT Tue Aug 18 2026
Dry weather will prevail for the Northland today through Wednesday night, though a few pas...