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Borough of West Chester, PAWest Chester, PA Weather Forecast
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West Chester Weather Forecast
| OVERNIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Chance of T-Storm | Partly Sunny | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Sunny | Mostly Clear | Sunny | Partly Cloudy | Chance of Showers |
| Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C |
| POP: 20% | POP: 40% | POP: 70% | POP: 70% | POP: 40% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 909 PM EDT Thu Aug 20 2026 
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West Chester Forecast Discussion
Issued: 918 PM EDT Thu Aug 20 2026
Key Messages
1. A cold front will cross the region this evening, resulting in widespread showers and thunderstorms. Flash flooding, damaging wind gusts and tornadoes are possible later today.
2. Conditions look to remain unsettled through the weekend, with daily chances of showers and storms each day.
3. Fair weather is expected to return for early next week.
Discussion
... KEY MESSAGE 1... Strong winds behind the convective activity appear to be in the wake of the two s...