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Town of Chatham, MassachusettsChatham, MA Weather Forecast
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| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  |  | |  |  | | | | |
| Mostly Clear | Mostly Sunny | Chance of Showers | Chance of Showers | Partly Cloudy | Mostly Sunny | Mostly Cloudy | Showers | Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Lo: 60°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 61°FHi: 16°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Hi: 65°FHi: 18°C Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C Lo: 59°FLo: 15°C |
| POP: 50% | POP: 50% | POP: 60% | POP: 60% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 103 AM EDT Thu Sep 17 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 759 PM EDT Wed Sep 16 2026
Key Messages
- Increased humidity and warmer temperatures continue tomorrow.
- Scattered showers possible Thursday evening into Friday morning.
- Rain chances return for the second half of the weekend. There remains uncertainty in the details such as coverage, timing, amounts.
Discussion
... KEY MESSAGE 1...Increased humidity and warmer temperatures continue tomorrow.
Warmer temperatures with increased humidity continue into tomorrow as an anomalous moisture plume and higher 925 mb temperatures advect int...