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Town of Dennis, MADennis, MA Weather Forecast
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Dennis Weather Forecast
| THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  | | |  |  | |  | | |  | |
| Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Sunny | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 60°FLo: 16°C | Hi: 65°FHi: 18°C | Hi: 65°FHi: 18°C Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C Lo: 55°FLo: 13°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C |
| POP: 50% | POP: 70% | POP: 50% | POP: 40% | POP: 40% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 102 PM EDT Fri Sep 18 2026 
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Issued: 302 PM EDT Fri Sep 18 2026
Key Messages
- Dry with fall-like weather tonight through Sat night. Lows both nights mainly in the 40s-lower 50s. Highs Sat mainly in the 60s perhaps flirting with 70 in the lower CT River Valley.
- Next chance for rain Sunday into Monday. There remains uncertainty in the details such as coverage, timing, and amounts. Showers may linger through early next week. A coastal low pressure is possible late next week.
Discussion
... KEY MESSAGE 1...Dry with fall-like weather tonight through Sat night. Lows b...