Foss Reservoir, MA Weather Forecast
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Foss Reservoir Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT |
| Patchy Fog | Isolated Showers | Partly Cloudy | Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Hi: 81°FHi: 27°C Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C Lo: 65°FLo: 18°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C Lo: 61°FLo: 16°C |
| POP: 20% | POP: 30% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 703 PM EDT Mon Aug 24 2026 

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Issued: 729 PM EDT Mon Aug 24 2026
Key Messages
- Mainly dry and seasonable conditions, outside of a stray shower this afternoon and Tuesday afternoon.
- Main risk for a round of scattered showers and a few thunderstorms will be sometime late Thu/Thu night into Fri with summerlike humidity. Mainly dry & seasonable weather favored for the weekend.
Discussion
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KEY MESSAGE 1...Mainly dry and seasonable conditions, outside of a stray shower this afternoon and Tuesday afternoon.
The synoptic setup for the next several days is as follows. A ...
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