Weather WorldMount Wilson, PA Weather Forecast
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| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | | | | | | | | |  | |
| Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 39°FLo: 4°C | Hi: 60°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 39°FLo: 4°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 600 PM EDT Wed Oct 21 2026 
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Instant definitions for any meteorological term.
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Issued: 218 PM EDT Wed Oct 21 2026
Key Messages
1) Seasonably dry pattern rolls into the last week of October
Discussion
... KEY MESSAGE 1: Seasonably dry pattern rolls on into the last week of October
Rinse and repeat. Great viewing tonight for the peak of the Orionid meteor shower. Frost headlines are probable Friday night/Saturday morning for Lebanon and Lancaster Counties.
Aviation
/18Z WEDNESDAY THROUGH MONDAY/... Outside of early morning river valley fog and areas of frost, expect solid VFR flying conditions into next week.