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Rittenhouse Square Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  |  | | | | | |  | |
| Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Sunny | Chance of Showers | Mostly Sunny | Partly Cloudy | Partly Sunny | Chance of Showers | Mostly Sunny | Mostly Clear | Sunny |
| Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 70°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 60°FHi: 16°C |
| POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM EDT Wed Sep 30 2026 
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Issued: 741 PM EDT Wed Sep 30 2026
Key Messages
1. Weak high pressure dominates with a warming trend through most of Friday.
2. Tidal flooding continues to recede in the back bays of New Jersey and Delaware.
3. Unsettled conditions late this week and late this weekend as a cold front passes through the region Friday night, followed by low pressure on Sunday.
Discussion
... KEY MESSAGE 1...Weak high pressure dominates with a warming trend through most of Friday.
Weak high pressure slowly sliding eastward off the coast will dominate thro...