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Grass Mountain Trail, PA Weather Forecast
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Grass Mountain Trail Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  |  |  | |  |  | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of Showers | Clearing | Sunny | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of Showers | Partly Cloudy | Mostly Sunny | Partly Cloudy |
| Hi: 75°FHi: 24°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°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 |
| POP: 100% | POP: 100% | POP: 50% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 600 AM EDT Sun Aug 16 2026 
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Grass Mountain Trail Forecast Discussion
Issued: 501 AM EDT Sun Aug 16 2026
Key Messages
1) Rain from several rounds of thunderstorms could be locally very heavy over the Laurel Highlands and South-Central Mountains this morning and again later in the day. There is still potential for some heavy rain to fall over the Lower Susquehanna Valley and Central Ridge-and- Valley region.
2) High pressure yields a short dry window for late Monday afternoon through Wednesday morning, before more storms arrive Wednesday afternoon into Thursday.
Discussion
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