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Borough of Monaca, PAMonaca, PA Weather Forecast
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Monaca Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
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| Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Mostly Sunny | Clear | Mostly Sunny | Clear | Chance of Showers | Chance of Showers | Showers |
| Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C |
| POP: 80% | POP: 70% | POP: 40% | POP: 40% | POP: 30% | POP: 50% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1102 PM EDT Fri Sep 11 2026 
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Issued: 307 AM EDT Sat Sep 12 2026
Key Messages
1) Widespread rain and isolated thunderstorms expected on Saturday with flooding and isolated damaging gusts possible
2) Still benchley for severe thunderstorms Sunday afternoon and evening with a cold front, but the level of the threat is uncertain
3) A brief bout of dry weather returns early next week
Discussion
... KEY MESSAGE 1... A renewed push of moisture is forecast today in strengthening south/southwest flow. This is occurring ahead of a shortwave trough that is riding up the Ohi...