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Monument Square Weather Forecast
| OVERNIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  | |  |  | | | | |  |  | |
| Partly Cloudy | Chance of Showers | Showers | Partly Sunny | Mostly Cloudy | Partly Sunny | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers |
| Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Hi: 61°FHi: 16°C Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C Lo: 51°FLo: 11°C |
| POP: 100% | POP: 100% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1003 PM EDT Sat Sep 19 2026 
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Issued: 729 PM EDT Sat Sep 19 2026
Key Messages
- Quiet through the rest of today, cooler tonight, with clouds returning before sunrise.
- Briefly dry early to mid morning, then beneficial rain overspreads southern New England and continues through the evening and overnight hours. Flooding concerns remain low.
- High pressure Tuesday gives way to a coastal system for the second half of the week
Discussion
... KEY MESSAGE 1...Quiet through the rest of today, cooler tonight, with clouds returning before sunrise.
A 1020-1025 mb high pressure ...