Williamstown, PA Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Williamstown, PA in one place.
Partly cloudy, with a low around 51. North wind around 8 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: Oct 15, 2026 4:02 AM EDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Williamstown, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 4:02 AM EDT
- Forecast office
- CTP
- Source
- NOAA / NWS
Daily Outlook
This Week in Williamstown
Friday looks like the warmest upcoming period in Williamstown at 75 degrees F.
Saturday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Friday Night at about 12 to 17 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 4:02 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- CTP
- Radar station
- KCCX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly sunny, with a high near 64. East wind 3 to 7 mph.
A chance of rain between 11pm and 2am, then rain likely and a slight chance of thunderstorms. Cloudy, with a low around 52. Southeast wind 3 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain and a slight chance of thunderstorms before 8am, then a chance of showers and thunderstorms between 2pm and 3pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 75. Southwest wind around 10 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 41. Northwest wind 12 to 17 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of rain showers before 8am. Mostly sunny, with a high near 48. Chance of precipitation is 20%.
Widespread frost after 11pm. Mostly clear, with a low around 32.
Widespread frost before 10am. Sunny, with a high near 56.
Mostly clear, with a low around 35.
Areas of frost before 8am. Sunny, with a high near 59.
Partly cloudy, with a low around 39.
Mostly sunny, with a high near 61.
Partly cloudy, with a low around 40.
Sunny, with a high near 61.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 15
|
Partly Cloudy
|
51°F |
8 mph
N
|
|
Thursday
Oct 15
|
Mostly Sunny
|
64°F |
3 to 7 mph
E
|
|
Thursday Night
Oct 15
|
Light Rain Likely
|
52°F |
3 to 10 mph
SE
|
|
Friday
Oct 16
|
Chance Light Rain then Chance Showers And Thunderstorms
|
75°F |
10 mph
SW
|
|
Friday Night
Oct 16
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
41°F |
12 to 17 mph
NW
|
|
Saturday
Oct 17
|
Slight Chance Rain Showers then Mostly Sunny
|
48°F |
10 to 17 mph
N
|
|
Saturday Night
Oct 17
|
Widespread Frost
|
32°F |
1 to 9 mph
N
|
|
Sunday
Oct 18
|
Widespread Frost then Sunny
|
56°F |
1 to 5 mph
W
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
35°F |
2 mph
SE
|
|
Monday
Oct 19
|
Areas Of Frost then Sunny
|
59°F |
1 to 5 mph
NE
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
39°F |
2 mph
NE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
61°F |
3 mph
N
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
40°F |
2 mph
N
|
|
Wednesday
Oct 21
|
Sunny
|
61°F |
3 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Williamstown.