Weather WorldMount Desert, ME Weather Forecast
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Mount Desert Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  | |  |  |  | | |  |  |  |
| Chance of Rain | Clearing | Partly Cloudy | Clearing | Mostly Clear | Sunny | Patchy Fog | Patchy Fog | Partly Cloudy | Partly Sunny | Chance of Showers | Chance of Showers |
| Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C |
| POP: 50% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM EDT Sun Sep 20 2026 
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Issued: 220 PM EDT Sun Sep 20 2026
Key Messages
1) Potential for patchy frost both Monday and Tuesday night across the north.
2) A coastal low could impact at least Downeast Maine late this week.
Discussion
... KEY MESSAGE 1... Potential for patchy frost both Monday and Tuesday night across the north.
KEY MESSAGE 1 DESCRIPTION... Strong Canadian high pressure builds into the region Monday night. With mostly clear skies amd light winds during the overnight hours, radiational cooling conditions are possible in the north. This could will...