Willis, MI Weather Forecast
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Willis Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
| Patchy Fog | Mostly Sunny | Patchy Fog | Mostly Sunny | Patchy Fog | Mostly Sunny | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Partly Cloudy | Mostly Cloudy |
| Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 331 PM EDT Wed Oct 21 2026 

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Issued: 332 AM EDT Thu Oct 22 2026
Key Messages
- Patchy fog possible this morning with better coverage of fog Friday morning.
- Mild and dry through the weekend.
Discussion
...
Longwave ridging over the central Plains will strengthen and expand into the Great Lakes through Saturday in response to a closed low near the Four corners opening up across the Rockies with and interaction with additional upper level disturbances/troughing that builds in across the Pacific Northwest. This will reinforce high pressure across the Great Lakes resul...
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