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Lake Williams Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  | |  |  |  |  | | | |  |  |
| Mostly Sunny | Mostly Clear | Sunny | Partly Cloudy | Showers Likely | Showers Likely | Partly Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm |
| Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C |
| POP: 70% | POP: 70% | POP: 40% | POP: 50% | POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 430 AM EDT Tue Aug 18 2026 
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Lake Williams Forecast Discussion
Issued: 130 AM EDT Tue Aug 18 2026
Key Messages
1) Numerous showers ahead of a cold front will die off as we lose the heating of the sun.
2) An unsettled but not particularly wet period is expected mid to late week.
Discussion
... KEY MESSAGE 1: Numerous showers ahead of a cold front will die off as we lose the heating of the sun.
The cold front is advancing through northern PA showing up as thin line of shallow convection at 3 PM. The air behind the front is not all that dry, but enough of a change shoul...