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Chatham Square Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Chance of Showers | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Chance of Showers |
| Hi: 80°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C |
| POP: 20% | POP: 50% | POP: 60% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 347 AM EDT Fri Aug 21 2026 
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Chatham Square Forecast Discussion
Issued: 450 AM EDT Fri Aug 21 2026
Key Messages
1) Showers linger east of NYC Metro today.
2) More showers forecast this weekend, marginal flood risk.
3) More of a dry weather pattern taking shape next week but still cooler than normal.
Discussion
... .KEY MESSAGE 1... Slight lowering of upper level trough into the region heading today into tonight.
At the surface, a wave of low pressure moves southeast of Long Island and then eventually moves to the south of Cape Cod by early Saturday.
Still have some cyclonic flow aloft, making for mo...