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Borough of Cheswick, PACheswick, PA Weather Forecast
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Cheswick Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Showers | Showers | Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Mostly Sunny | Clear | Mostly Sunny | Clear |
| Hi: 65°FHi: 18°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: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C |
| POP: 90% | POP: 70% | POP: 70% | POP: 70% | POP: 70% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 500 AM EDT Mon Sep 21 2026 
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Issued: 204 AM EDT Mon Sep 21 2026
Key Messages
1) Rain chances continue into early this week. Longer duration rainfall totals could be high and lead to localized flooding and/or river rises
2) Much cooler temperatures arrive by mid-week
Discussion
... KEY MESSAGE 1... An MCS that moved into central West Virginia Sunday evening will provide a shield of stratiform light to moderate rain with embedded thunder across eastern Ohio overnight Sunday night. While true flash flood concerns are lower, some localized heavier rates are tracking...