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South Mountain Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
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| Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C |
| POP: 50% | POP: 100% | POP: 80% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 730 AM EDT Sat Aug 15 2026 
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South Mountain Forecast Discussion
Issued: 725 AM EDT Sat Aug 15 2026
Key Messages
1) Areas of dense fog early today in the valleys of South- Central PA and the Laurel Highlands.
2) Widespread rain will develop across the CWA Sunday morning and bring light to moderate amounts of one-quarter to three quarters of an inch. After a warm front moves into Central and Northern PA early Sunday afternoon, thunderstorms will develop near and to the south of this boundary bringing locally heavy rain in excess of one inch in just 20-30 minutes with...