MacArthur, PA Weather Forecast
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MacArthur Weather Forecast
| OVERNIGHT | TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Showers | Chance of Showers | Showers | Showers | Showers | Chance of Showers | Partly Cloudy | Mostly Sunny |
| Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°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 |
| POP: 60% | POP: 100% | POP: 50% | POP: 50% | POP: 70% | POP: 70% | POP: 80% | POP: 80% | POP: 60% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 108 AM EDT Sun Sep 20 2026 

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Issued: 228 AM EDT Sun Sep 20 2026
Key Messages
1) Rain chances return today and continue into early next 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... It seems another period of active and wet weather is upon the region. The upper pattern features a continued flatten ridge aloft over the eastern CONUS with another shortwave trough approaching the region. The patten sets up a storm track across the Mi...
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