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Jacobus Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
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| Chance of Showers | Chance of Showers | Chance of T-Storm | Showers Likely | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 45°FLo: 7°C | Hi: 51°FHi: 11°C | Lo: 31°FLo: -1°C | Hi: 55°FHi: 13°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C |
| POP: 20% | POP: 50% | POP: 70% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 900 AM EDT Thu Oct 15 2026 
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Issued: 416 AM EDT Thu Oct 15 2026
Key Messages
1) Potent storm system moves across PA tonight and Fri with a severe threat Fri aftn/eve.
2) Windy with first flakes on the higher terrain of the north Fri night/Sat morning
3) Cold weather may end the growing season for many places this weekend, with Sun morning the coldest.
Discussion
... KEY MESSAGE 1: Potent storm system moves across PA tonight and Fri with a severe threat Fri aftn/eve.
A surface low moving through the Midwest will cross the Great Lakes tonight and Fri. A warm front w...