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Borough of Monaca, PAMonaca, PA Weather Forecast
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Monaca Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Sunny | Partly Cloudy |
| Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C |
| POP: 20% | POP: 100% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 502 AM EDT Wed Sep 09 2026 
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Issued: 321 AM EDT Wed Sep 9 2026
Key Messages
1) Strong to severe storm potential late this evening north of Pittsburgh
2) An active weather pattern could occur early next week.
Discussion
... KEY MESSAGE 1... High-resolution models continue to indicate that shower and thunderstorm activity will increase late this evening just south of Lake Erie as an approaching trough and its associated cold front move into the region.
The most likely window for storms to develop would be between 7pm to 9pm near I-80. A few storms could be strong ...