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Boxboro Weather Forecast
| THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | |  | |  | | | |  | |  |
| Sunny | Clear | Sunny | Showers | Showers | Partly Cloudy | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C Lo: 49°FLo: 9°C | Hi: 81°FHi: 27°C Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C Lo: 51°FLo: 11°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C |
| POP: 70% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1003 AM EDT Fri Sep 11 2026 
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Issued: 651 AM EDT Fri Sep 11 2026
Key Messages
- Plenty of sunshine with comfortable humidity today & Sat and highs in the 70s. Lows tonight in the 40s & 50s.
- Showers and possibly a few thunderstorms with brief torrential rainfall possible late Sat night into the first half of Sun. Low probability for localized flash flooding.
- Dry and seasonable Mon-Tue but a brief bout of summer warmth and humidity possible Wed and/or Thu ahead of a cold front.
Discussion
... KEY MESSAGE 1...Plenty of sunshine with comfortable humidity today & Sat a...