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Borough of Mount Joy, PAMount Joy, PA Weather Forecast
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Mount Joy Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  | |  |  |  | | |  | | | |
| Mostly Cloudy | Showers | Showers | Showers Likely | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers | Mostly Cloudy |
| Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 60°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C |
| POP: 70% | POP: 90% | POP: 70% | POP: 30% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 430 AM EDT Mon Sep 21 2026 
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Issued: 529 AM EDT Mon Sep 21 2026
Key Messages
1) Periods of rain today through Wednesday. Greatest areal coverage tonight.
2) Trending drier later in the week as a coastal storm develops offshore.
Discussion
... KEY MESSAGE 1: Periods of rain today through Wednesday. Greatest areal coverage tonight.
What remains of an MCV that dropped 3-5 inches of rain in OH/WV will move into the Laurel Highlands this morning and spread northward towards I-80 through the day. Given the lack of instability in central PA, rainfall rates will be on th...