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Grubb Lake, MN Weather Forecast
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Grubb Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  |  |  |  | | |  | | |  |
| Patchy Fog | Mostly Clear | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of T-Storm | Clouds | Mostly Clear | Mostly Sunny | Partly Cloudy |
| Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C |
| POP: 50% | POP: 50% | POP: 60% | POP: 70% | POP: 80% |
POP = Probability of Precipitation.
Weather Outlook Updated: 718 AM CDT Fri Sep 04 2026 
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Issued: 632 AM CDT Fri Sep 4 2026
Key Messages
- Hot & humid today into saturday with heat index values of 95-100 possible. Heat Advisory in effect for Twin Cities metro during the afternoon.
- Frequent chances for scattered showers & thunderstorms into next week.
Discussion
... Issued at 352 AM CDT Fri Sep 4 2026
Heat and humidity are the main weather concern for today, with widespread heat indices in the 90s expected this afternoon. A pool of dewpoints in the low 70s remain across much of the southern half of MN and western WI, howeve...