Williamstown, NJ weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Williamstown now
Loading the National Weather Service forecast…
Williamstown weather by the hour
Williamstown weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Williamstown.
This week in Williamstown
Sunrise, sunset and moon in Williamstown
What is the weather usually like in Williamstown?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 87°F average high
- Januarycoldest month · 25°F average low
- 47.4 inprecipitation per year · 1,205 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Williamstown: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station GLASSBORO 2 NE, NJ US (USC00283291), adjusted for the elevation of Williamstown.
Williamstown weather month by month
Sunrise and sunset in Williamstown through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:17 AM | 5:01 PM | 9 h 44 min |
| February | 6:50 AM | 5:37 PM | 10 h 47 min |
| March | 7:09 AM | 7:08 PM | 11 h 58 min |
| April | 6:20 AM | 7:39 PM | 13 h 18 min |
| May | 5:43 AM | 8:08 PM | 14 h 25 min |
| June | 5:29 AM | 8:30 PM | 15 h 1 min |
| July | 5:43 AM | 8:28 PM | 14 h 45 min |
| August | 6:10 AM | 7:57 PM | 13 h 46 min |
| September | 6:39 AM | 7:10 PM | 12 h 30 min |
| October | 7:08 AM | 6:22 PM | 11 h 13 min |
| November | 6:43 AM | 4:45 PM | 10 h 2 min |
| December | 7:12 AM | 4:38 PM | 9 h 25 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in Williamstown?
Williamstown has a humid subtropical climate. The warmest month is July, with an average high of 87°F (30°C), and the coldest is January, with average lows of 25°F (-4°C).
It gets about 47.4 inches (1,205 mm) of precipitation a year. The wettest month is August and the driest is February.
The best time to visit Williamstown is May–June and August–September. At 141 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Williamstown
Weather in towns near Williamstown
Questions about the weather in Williamstown
What is the hottest month in Williamstown?
July, with an average high of 87°F (30°C).
What is the coldest month in Williamstown?
January, with an average low of 25°F (-4°C).
How much does it rain in Williamstown?
About 47.4 inches (1,205 mm) a year; the wettest month is August.
Does it snow in Williamstown?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Williamstown?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Williamstown have?
Humid subtropical (Köppen Cfa).
What is the weather like in Williamstown in November?
Highs average 55°F and lows 37°F, with about 3.2 inches of precipitation.
What time is sunrise in Williamstown?
Around 6:43 AM in mid-November, and sunset around 4:45 PM. Today’s exact times are shown above.
Where does this Williamstown weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Williamstown.
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