Williamstown, PA Weather Forecast

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Williamstown, PA Weather Forecast

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Williamstown PA weather  - Overcast - 56°F
Overcast
56°F
Updated 3:54 am
Feels Like 42°F
Humidity 63%
Wind N 9 mph
Barometer  29.94 in
Dew Point 44°F
Williamstown PA weather  - Overcast - 14°C
Overcast
14°C
Updated 3:54 am
Feels Like 6°C
Humidity 63%
Wind N 14 km/h
Barometer  101.4 kPa
Dew Point 7°C

Williamstown Weather Forecast

REST OF TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY
Williamstown, PA Weather - Rest Of Tonight Cloudy Williamstown, PA Weather - Saturday Clearing Williamstown, PA Weather - Saturday Night Clear Williamstown, PA Weather - Sunday Sunny Williamstown, PA Weather - Sunday Night Mostly Clear Williamstown, PA Weather - Monday Sunny Williamstown, PA Weather - Monday Night Partly Cloudy Williamstown, PA Weather - Tuesday Sunny Williamstown, PA Weather - Tuesday Night Mostly Clear Williamstown, PA Weather - Wednesday Sunny Williamstown, PA Weather - Wednesday Night Mostly Clear Williamstown, PA Weather - Thursday Mostly Sunny
Cloudy Clearing Clear Sunny Mostly Clear Sunny Partly Cloudy Sunny Mostly Clear Sunny Mostly Clear Mostly Sunny
Lo: 49°FLo: 9°C Hi: 51°FHi: 11°C
Lo: 31°FLo: -1°C Hi: 59°FHi: 15°C
Lo: 35°FLo: 2°C Hi: 61°FHi: 16°C
Lo: 41°FLo: 5°C Hi: 69°FHi: 21°C
Lo: 41°FLo: 5°C Hi: 65°FHi: 18°C
Lo: 41°FLo: 5°C Hi: 65°FHi: 18°C
POP = Probability of Precipitation.
Weather Outlook Updated: 300 AM EDT Sat Oct 17 2026 Williamstown, PA Weather - WeatherWorld.com

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Williamstown Forecast Discussion

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Issued: 244 AM EDT Sat Oct 17 2026

Key Messages

1) Frost/Freeze late tonight into early Sunday morning

2) Extended stretch of dry weather next week


Discussion

... KEY MESSAGE 1: Frost/Freeze late tonight into early Sunday morning

A noticeably cooler northerly breeze, expansive cloud cover, and spotty light precip this morning eventually gives way to clearing skies and diminishing wind by tonight as high pressure slides eastward from the Ohio Valley. This sets up favorable conditions for a widespread frost/freeze overnight into early S...