Williamstown, NJ Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Williamstown, NJ in one place.
Sunny, with a high near 91. Southwest wind 5 to 10 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: Jul 14, 2026 12:02 AM EDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Williamstown, NJ.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 12:02 AM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in Williamstown
Wednesday looks like the warmest upcoming period in Williamstown at 99 degrees F.
Sunday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 10 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 12:02 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
Mostly clear, with a low around 72. Southwest wind around 10 mph.
Sunny, with a high near 99. Heat index values as high as 105. West wind 5 to 10 mph.
Partly cloudy, with a low around 75. Northwest wind 0 to 10 mph.
Mostly sunny, with a high near 95.
Partly cloudy, with a low around 73.
Sunny, with a high near 95.
A slight chance of showers and thunderstorms after 8pm. Mostly clear, with a low around 72.
A chance of showers and thunderstorms. Mostly sunny, with a high near 94. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 50%.
Showers and thunderstorms likely. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
91°F |
5 to 10 mph
SW
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
72°F |
10 mph
SW
|
|
Wednesday
Jul 15
|
Sunny
|
99°F |
5 to 10 mph
W
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
75°F |
0 to 10 mph
NW
|
|
Thursday
Jul 16
|
Mostly Sunny
|
95°F |
0 to 5 mph
NW
|
|
Thursday Night
Jul 16
|
Partly Cloudy
|
73°F |
0 to 5 mph
NW
|
|
Friday
Jul 17
|
Sunny
|
95°F |
0 to 5 mph
NW
|
|
Friday Night
Jul 17
|
Slight Chance Showers And Thunderstorms
|
72°F |
0 to 5 mph
SE
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
94°F |
0 to 5 mph
S
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
71°F |
0 to 5 mph
SW
|
|
Sunday
Jul 19
|
Showers And Thunderstorms Likely
|
87°F |
5 mph
NW
|
|
Sunday Night
Jul 19
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
68°F |
0 to 5 mph
N
|
|
Monday
Jul 20
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
85°F |
0 to 5 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Williamstown.
