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Grena Lake Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT |
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| Clear | Isolated Showers | Isolated Showers | Partly Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy |
| Lo: 45°FLo: 7°C | Hi: 68°FHi: 20°C | Lo: 55°FLo: 13°C | Hi: 73°FHi: 23°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Hi: 68°FHi: 20°C Lo: 55°FLo: 13°C | Hi: 68°FHi: 20°C Lo: 55°FLo: 13°C | Hi: 68°FHi: 20°C Lo: 55°FLo: 13°C | Hi: 73°FHi: 23°C Lo: 53°FLo: 12°C |
| POP: 20% | POP: 20% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 637 PM CDT Tue Sep 15 2026 
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Issued: 633 PM CDT Tue Sep 15 2026
Key Messages
- Frost is forecast early Wednesday morning in northwest Minnesota near Lake of the Woods to Red Lakes area.
- There is a medium chance for showers and weak thunderstorms Wednesday. Additional chances for rain come Friday into the weekend.
Discussion
... Issued at 338 PM CDT Tue Sep 15 2026
...Synopsis...
Post-cold frontal, continental air mass continues to spread throughout our region behind yesterday`s cold front/system. Breezy winds will taper tonight as surface high pressure settles into...