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Borough of Saint Clair, PASt. Clair, PA Weather Forecast
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St. Clair Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  | |  | |  |  | |  | | |
| Mostly Sunny | Chance of Rain | Chance of Rain | Chance of Rain | Rain | Rain | Mostly Cloudy | Mostly Cloudy | Partly Sunny | Partly Cloudy | Mostly Sunny | Mostly Cloudy |
| Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C |
| POP: 20% | POP: 50% | POP: 50% | POP: 70% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 430 AM EDT Fri Sep 25 2026 
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Issued: 338 AM EDT Fri Sep 25 2026
Key Messages
1) Nor`easter this weekend will stay far enough off to our east to make gusty winds Saturday and Sunday, and mainly light rain for only the eastern half of the CWA. Otherwise: dry thru Wed.
Discussion
... KEY MESSAGE 1: Nor`easter this weekend will stay far enough off to our east to make gusty winds Saturday and Sunday, and mainly light rain for only the eastern half of the CWA. Otherwise: dry thru Wed.
Honorable mention: Morning fog and frost will both go away quickly thanks to sunshin...