Williamstown, PA Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Williamstown, PA in one place.
Rain showers likely. Partly sunny, with a high near 53. Northwest wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Williamstown, PA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 17, 2026 8:35 PM EDT.
The active forecast window currently covers Apr 19 to Apr 24, 2026 for Williamstown, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 19 to Apr 24, 2026
- Latest sync
- Apr 17, 2026 8:35 PM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Williamstown
Friday looks like the warmest upcoming period in Williamstown at 79 degrees F.
Monday Night is the coolest period ahead with temperatures near 28 degrees F.
The strongest winds are forecast for Sunday at about 8 to 14 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 17, 2026 8:35 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- PBZ
- Radar station
- KPBZ
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers before 4am, then widespread frost and a slight chance of rain showers. Mostly cloudy, with a low around 34. West wind 6 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Widespread frost and a slight chance of rain showers before 8am. Mostly sunny, with a high near 49. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 28.
Mostly sunny, with a high near 66.
A chance of rain showers after 8pm. Partly cloudy, with a low around 49. Chance of precipitation is 30%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 48. Chance of precipitation is 30%.
Mostly sunny, with a high near 75.
Mostly clear, with a low around 51.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 79.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 19
|
Rain Showers Likely
|
53°F |
8 to 14 mph
NW
|
|
Sunday Night
Apr 19
|
Chance Rain Showers
|
34°F |
6 to 12 mph
W
|
|
Monday
Apr 20
|
Widespread Frost then Mostly Sunny
|
49°F |
6 to 10 mph
NW
|
|
Monday Night
Apr 20
|
Mostly Clear
|
28°F |
1 to 8 mph
NE
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
66°F |
2 to 9 mph
S
|
|
Tuesday Night
Apr 21
|
Chance Rain Showers
|
49°F |
8 mph
SW
|
|
Wednesday
Apr 22
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
72°F |
6 to 9 mph
W
|
|
Wednesday Night
Apr 22
|
Chance Showers And Thunderstorms then Partly Cloudy
|
48°F |
2 to 7 mph
NW
|
|
Thursday
Apr 23
|
Mostly Sunny
|
75°F |
2 to 6 mph
SW
|
|
Thursday Night
Apr 23
|
Mostly Clear
|
51°F |
5 mph
E
|
|
Friday
Apr 24
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
79°F |
3 to 8 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Williamstown.