Williamstown, NJ Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Williamstown, NJ in one place.
Partly cloudy, with a low around 56. West wind around 0 mph.
Local Weather Overview
This forecast page for Williamstown, NJ 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 13, 2026 7:06 AM EDT.
The active forecast window currently covers Oct 13 to Oct 19, 2026 for Williamstown, NJ.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 7:06 AM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in Williamstown
Wednesday looks like the warmest upcoming period in Williamstown at 83 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday Night at about 10 to 15 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 7:06 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- PHI
- Radar station
- KDIX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Sunny, with a high near 78. Southwest wind 0 to 5 mph.
Mostly clear, with a low around 64. Southwest wind around 5 mph.
Sunny, with a high near 83. West wind around 5 mph.
A slight chance of rain showers between 7pm and 2am. Mostly cloudy, with a low around 59. Northwest wind 0 to 5 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 69.
Showers and thunderstorms likely after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
Showers and thunderstorms likely before 2am. Partly cloudy, with a low around 44. Chance of precipitation is 60%.
Sunny, with a high near 54.
Mostly clear, with a low around 36.
Sunny, with a high near 57.
Mostly clear, with a low around 40.
Sunny, with a high near 64.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 13
|
Partly Cloudy
|
56°F |
0 mph
|
|
Tuesday
Oct 13
|
Sunny
|
78°F |
0 to 5 mph
SW
|
|
Tuesday Night
Oct 13
|
Mostly Clear
|
64°F |
5 mph
SW
|
|
Wednesday
Oct 14
|
Sunny
|
83°F |
5 mph
W
|
|
Wednesday Night
Oct 14
|
Slight Chance Rain Showers
|
59°F |
0 to 5 mph
NW
|
|
Thursday
Oct 15
|
Mostly Sunny
|
69°F |
0 to 5 mph
NE
|
|
Thursday Night
Oct 15
|
Mostly Cloudy then Showers And Thunderstorms Likely
|
55°F |
0 to 5 mph
SE
|
|
Friday
Oct 16
|
Showers And Thunderstorms Likely
|
75°F |
5 to 10 mph
SW
|
|
Friday Night
Oct 16
|
Showers And Thunderstorms Likely
|
44°F |
10 to 15 mph
NW
|
|
Saturday
Oct 17
|
Sunny
|
54°F |
10 to 15 mph
NW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
36°F |
0 to 10 mph
NW
|
|
Sunday
Oct 18
|
Sunny
|
57°F |
0 to 5 mph
W
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
40°F |
0 mph
|
|
Monday
Oct 19
|
Sunny
|
64°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Williamstown.
