UTC Offset
UTC-04:00
Williamstown, United States Snapshot 2026
Where is Williamstown?
Williamstown, United States
- Continent
- Americas
- Country
- United States
- City
- Williamstown
- Population
- 15.6K
- Elevation
- 44 m
- Coordinates
- 39.69°, -75.00°
Williamstown is a city in United States with a population of approximately 15.6K. Average temperatures range from -1°C (30°F) in January to 30°C (86°F) in July. The best time to visit is April, May, June, August, September.
Time in Williamstown right now
Open full time & time zone page 17:13 13
Monday, June 15, 2026
IANA time zone
America/New_York
Daylight saving
DST in effect
EST / EDT
Next DST change
November 1
backward -1h
Live weather in Williamstown
Daylight in Williamstown today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 58m
Climate normals for Williamstown
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April best
Good May best
Excellent June best
Excellent July
Fair August best
Good September best
Excellent October
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / -1°C | 2°C / -6°C | 10days (78 mm) Wet | 6.1h Fair | 66% Muggy | 2.4 Moderate | Poor | View Details |
| February | 8°C / 0°C | 5°C / -4°C | 10days (89 mm) Wet | 6.7h Fair | 67% Muggy | 3.5 Moderate | Poor | View Details |
| March | 12°C / 3°C | 9°C / -1°C | 10days (102 mm) Wet | 8.1h Good | 63% Muggy | 4.8 Moderate | Poor | View Details |
| April best | 18°C / 8°C | 16°C / 5°C | 10days (94 mm) Wet | 9h Good | 64% Muggy | 5.4 High | Good | View Details |
| May best | 22°C / 13°C | 22°C / 12°C | 12days (112 mm) Wet | 9.4h Good | 70% Muggy | 6.2 High | Excellent | View Details |
| June best | 27°C / 18°C | 29°C / 19°C | 12days (96 mm) Wet | 11.4h Excellent | 69% Muggy | 7.1 Very High | Excellent | View Details |
| July | 30°C / 22°C | 34°C / 25°C | 15days (134 mm) Wet | 11.6h Excellent | 73% Muggy | 7.4 Very High | Fair | View Details |
| August best | 29°C / 21°C | 31°C / 23°C | 12days (102 mm) Wet | 10.4h Excellent | 73% Muggy | 6.5 High | Good | View Details |
| September best | 26°C / 18°C | 27°C / 18°C | 9days (95 mm) Wet | 8.6h Good | 73% Muggy | 5.1 High | Excellent | View Details |
| October | 20°C / 12°C | 19°C / 11°C | 8days (93 mm) Wet | 7.5h Good | 71% Muggy | 4.4 Moderate | Good | View Details |
| November | 13°C / 5°C | 10°C / 2°C | 8days (67 mm) Wet | 7.2h Good | 67% Muggy | 3 Moderate | Fair | View Details |
| December | 8°C / 1°C | 4°C / -3°C | 10days (95 mm) Wet | 5.6h Fair | 69% Muggy | 2.2 Moderate | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 6°C / -1°C . Feb: 8°C / 0°C . Mar: 12°C / 3°C . Apr: 18°C / 8°C . May: 22°C / 13°C . Jun: 27°C / 18°C . Jul: 30°C / 22°C . Aug: 29°C / 21°C . Sep: 26°C / 18°C . Oct: 20°C / 12°C . Nov: 13°C / 5°C . Dec: 8°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 78 mm. Feb: 89 mm. Mar: 102 mm. Apr: 94 mm. May: 112 mm. Jun: 96 mm. Jul: 134 mm. Aug: 102 mm. Sep: 95 mm. Oct: 93 mm. Nov: 67 mm. Dec: 95 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 66%. Feb: 67%. Mar: 63%. Apr: 64%. May: 70%. Jun: 69%. Jul: 73%. Aug: 73%. Sep: 73%. Oct: 71%. Nov: 67%. Dec: 69%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 20 km/h . Feb: 20 km/h . Mar: 21 km/h . Apr: 21 km/h . May: 17 km/h . Jun: 16 km/h . Jul: 14 km/h . Aug: 14 km/h . Sep: 15 km/h . Oct: 17 km/h . Nov: 19 km/h . Dec: 18 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 4. Mar: UV 5. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Williamstown has a population of approximately 15.6K.
The best months to visit Williamstown are April, May, June, August, September, when temperatures are pleasant and rainfall is lower.
Williamstown receives approximately 1157mm of rainfall annually across 126 rainy days.
Williamstown is located in United States, in the Americas region.
Williamstown sits at an elevation of 44 m (144 ft) above sea level.