Devon, PA Weather Forecast
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Devon Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C |
| POP: 70% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM EDT Thu Sep 03 2026 

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Issued: 248 PM EDT Thu Sep 3 2026
Key Messages
1. Showers and thunderstorms are expected again tonight and Friday.
2. Hot and humid conditions are forecast across the region into the evening.
3. The Labor Day Weekend will feature mostly dry weather with at or below normal temperatures and lower humidity.
Discussion
... KEY MESSAGE 1... Showers and thunderstorms are expected again tonight and Friday.
As short waves continue to move across the Great Lakes then then turn southeast across the northern Middle Atlantic region, we will see m...
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