Williamson School, PA Weather Forecast
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Williamson School Weather Forecast
| THIS AFTERNOON | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
| Chance of Showers | Chance of T-Storm | Chance of Showers | Partly Cloudy | Chance of Showers | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 60°FLo: 16°C |
| POP: 20% | POP: 90% | POP: 50% | POP: 40% | POP: 40% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 131 PM EDT Sat Aug 22 2026 

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Williamson School Forecast Discussion
Issued: 101 PM EDT Sat Aug 22 2026
Key Messages
1) Upper level low pressure swinging SE from the upper Glakes to southern Ontario will lead to high temps trending cooler by a few to several degrees each day through Monday along with periods of showers and isolated to scattered gusty thunderstorms.
Discussion
... KEY MESSAGE 1: Upper level low pressure swinging SE from the upper Glakes to southern Ontario will lead to high temps trending cooler by a few to several degrees each day through Monday along with periods of showers and isol...
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