Williamstown, PA Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Williamstown, PA in one place.
Partly sunny, with a high near 79. North wind 3 to 7 mph.
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: Jul 18, 2026 11:27 PM EDT.
The active forecast window currently covers Jul 19 to Jul 25, 2026 for Williamstown, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 19 to Jul 25, 2026
- Latest sync
- Jul 18, 2026 11:27 PM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Williamstown
Tuesday looks like the warmest upcoming period in Williamstown at 83 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 14 mph SW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 18, 2026 11:27 PM EDT
- Coverage
- 7 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
Mostly clear, with a low around 57. North wind 1 to 6 mph.
Sunny, with a high near 82. North wind 0 to 3 mph.
Mostly cloudy, with a low around 65. Southeast wind 1 to 5 mph.
Showers and thunderstorms after 8am. Mostly cloudy, with a high near 83. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 90%.
A chance of rain showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 76. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 56.
Sunny, with a high near 76.
Mostly clear, with a low around 56.
Sunny, with a high near 81.
Partly cloudy, with a low around 61.
Mostly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Jul 19
|
Partly Sunny
|
79°F |
3 to 7 mph
N
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
57°F |
1 to 6 mph
N
|
|
Monday
Jul 20
|
Sunny
|
82°F |
0 to 3 mph
N
|
|
Monday Night
Jul 20
|
Mostly Cloudy
|
65°F |
1 to 5 mph
SE
|
|
Tuesday
Jul 21
|
Showers And Thunderstorms
|
83°F |
6 to 14 mph
SW
|
|
Tuesday Night
Jul 21
|
Showers And Thunderstorms
|
66°F |
7 to 12 mph
SW
|
|
Wednesday
Jul 22
|
Chance Showers And Thunderstorms
|
76°F |
8 to 12 mph
W
|
|
Wednesday Night
Jul 22
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
56°F |
2 to 10 mph
NW
|
|
Thursday
Jul 23
|
Sunny
|
76°F |
1 to 6 mph
NW
|
|
Thursday Night
Jul 23
|
Mostly Clear
|
56°F |
0 to 5 mph
N
|
|
Friday
Jul 24
|
Sunny
|
81°F |
0 to 3 mph
E
|
|
Friday Night
Jul 24
|
Partly Cloudy
|
61°F |
0 to 3 mph
E
|
|
Saturday
Jul 25
|
Mostly Sunny
|
83°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Williamstown.