Cornwall Lake, MI Weather Forecast
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Cornwall Lake Weather Forecast
| THIS AFTERNOON | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
| Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Sunny | Partly Cloudy | Partly Sunny | Mostly Clear |
| Hi: 65°FHi: 18°C | Lo: 39°FLo: 4°C | Hi: 69°FHi: 21°C | Lo: 39°FLo: 4°C | Hi: 70°FHi: 21°C | Lo: 40°FLo: 4°C | Hi: 71°FHi: 22°C | Lo: 40°FLo: 4°C | Hi: 71°FHi: 22°C | Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 137 PM EDT Wed Sep 23 2026 

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Issued: 123 PM EDT Wed Sep 23 2026
Key Messages
-High pressure continues seasonably normal fall-like temperatures built this week with no precipitation expected through the remainder of the week.
-Chilly overnight low temperatures keep patchy frost concerns this week.
Discussion
... Issued at 226 AM EDT Wed Sep 23 2026
Pattern Synopsis and Forecast:
There is not much active weather to report for this forecast cycle as a midlevel split flow pattern with a classic high over low blocking set up will keep conditions quiet across the Great ...
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