Climate and monthly weather forecastWilliamstown, MA
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Williamstown, Massachusetts, with an average temperature varying between 14.7°F (-9.6°C) and 27°F (-2.8°C). Temperature readings reach their annual highs in January, averaging 27°F (-2.8°C) and a minimum average of 14.7°F (-9.6°C). Weather in January »Weather in February
February, the last month of the winter in Williamstown, is another freezing cold month, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 29.8°F (-1.2°C). The start of February marks an average high-temperature of a still freezing cold 29.8°F (-1.2°C), hardly distinguishable from the conditions in January. Weather in February »Weather in March
March, the first month of the spring in Williamstown, is an icy month, with an average temperature varying between 38.8°F (3.8°C) and 23.5°F (-4.7°C). March marks a rise in the average high-temperature, moving from February's subzero cold 29.8°F (-1.2°C) to a cold 38.8°F (3.8°C). Weather in March »Weather in April
April is a fresh spring month in Williamstown, Massachusetts, with an average temperature varying between 34.3°F (1.3°C) and 51.6°F (10.9°C). The transition from March to April brings a temperature rise, with average high-temperatures increasing from an icy 38.8°F (3.8°C) to a fresh 51.6°F (10.9°C). Weather in April »Weather in May
May, the last month of the spring in Williamstown, is a refreshing month, with an average temperature ranging between min 45.1°F (7.3°C) and max 65.1°F (18.4°C). With the onset of May, Williamstown sees a temperature rise, with the average high-temperature moving from April's cool 51.6°F (10.9°C) to a comfortable 65.1°F (18.4°C). Weather in May »Weather in June
June, the first month of the summer in Williamstown, is an agreeable month, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 51.4°F (10.8°C). As May transitions into June, a subtle temperature shift is observed, with average highs adjusting from a refreshing 65.1°F (18.4°C) to an agreeable 72.3°F (22.4°C). Weather in June »Weather in July
July is a moderately hot summer month in Williamstown, Massachusetts, with an average temperature ranging between min 57°F (13.9°C) and max 78.6°F (25.9°C). July tends to be the warmest month, with temperatures averaging a daily high of 78.6°F (25.9°C) and a low of 57°F (13.9°C). Weather in July »Weather in August
August, the last month of the summer in Williamstown, is also a moderately hot month, with an average temperature fluctuating between 55.8°F (13.2°C) and 76.5°F (24.7°C). Williamstown sees the arrival of August with an average high-temperature of a still moderately hot 76.5°F (24.7°C), indicating a subtle variation from July. Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Williamstown, Massachusetts, with an average temperature fluctuating between 49.3°F (9.6°C) and 69.1°F (20.6°C). The start of September signals a gentle decrease in the average high-temperature, transitioning from a moderately hot 76.5°F (24.7°C) in August to an agreeable 69.1°F (20.6°C). Weather in September »Weather in October
October, the same as September, in Williamstown, Massachusetts, is another refreshing autumn month, with an average temperature ranging between min 41°F (5°C) and max 55.9°F (13.3°C). The transition into October indicates a reduction in the average high-temperature, down to a moderate 55.9°F (13.3°C) from September's agreeable 69.1°F (20.6°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Williamstown, Massachusetts, with an average temperature varying between 30°F (-1.1°C) and 43.7°F (6.5°C). November indicates a shift in the average high-temperature, from October's refreshing 55.9°F (13.3°C) to a frosty 43.7°F (6.5°C). Weather in November »Weather in December
December, the first month of the winter in Williamstown, is also an icy month, with an average temperature fluctuating between 22.1°F (-5.5°C) and 32.7°F (0.4°C). Williamstown's weather in December involves a decrease in the average high-temperature, moving down from November's frosty 43.7°F (6.5°C) to a cold 32.7°F (0.4°C). Weather in December »Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the month when Williamstown experiences its coldest temperatures, averaging a high of 27°F (-2.8°C) and a low of 14.7°F (-9.6°C).
In Williamstown, during the entire year, the rain falls for 167.1 days and collects up to 35.98" (914mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 66.1 snowfall days, and 39.09" (993mm) of snow is accumulated.
February is the most humid month, with an average relative humidity of 86%.
February is the month with the most snowfall. Snow falls for 15.8 days and accumulates 10" (254mm) of snow.
February has the least sunshine of the year, with an average of 3.4h of sunshine.
The months with the lowest UV index are February and December, with an average maximum UV index of 1.
The month with the least rainfall is March, when the rain falls for 14.1 days and typically collects 2.6" (66mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The least humid month is April, with an average relative humidity of 77%.
In Williamstown, snow does not fall in June through September.
The month with the longest days in Williamstown is June, with an average of 15h and 18min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 5.
In Williamstown, the peak average temperatures are observed in July, with a high of 78.6°F (25.9°C) and a low of 57°F (13.9°C).
With an average of 9.9h of sunshine, July has the most sunshine of the year.
October is the month with the most rainfall. Rain falls for 15.5 days and accumulates 3.62" (92mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Williamstown, MA
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure
Williamstown, MA
- Average pressure in January:
30.03"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Williamstown, MA
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.8mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.1mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.5mph - Average wind speed in October:
7mph - Average wind speed in November:
7.7mph - Average wind speed in December:
8.4mph
The windiest months (with the highest average wind speed) are January and February (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Williamstown, MA
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (77%).
Average rainfall
Williamstown, MA
- Average rainfall in January:
2.64" - Average rainfall in February:
2.76" - Average rainfall in March:
2.6" - Average rainfall in April:
3.15" - Average rainfall in May:
3.31" - Average rainfall in June:
3.07"
- Average rainfall in July:
3.19" - Average rainfall in August:
2.95" - Average rainfall in September:
2.72" - Average rainfall in October:
3.62" - Average rainfall in November:
2.8" - Average rainfall in December:
3.19"
The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is March (2.6").
Average rainfall days
Williamstown, MA
- Average rainfall days in January:
8.9 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
17 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
17.3 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
15.5 days - Average rainfall days in November:
11.8 days - Average rainfall days in December:
11.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (7.8 days).
Average snowfall
Williamstown, MA
The month with the highest snowfall is February (10").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Williamstown, MA
- Average snowfall days in January:
15.6 days - Average snowfall days in February:
15.8 days - Average snowfall days in March:
12.6 days - Average snowfall days in April:
4.3 days - Average snowfall days in May:
0.5 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.9 days - Average snowfall days in November:
5.2 days - Average snowfall days in December:
11.2 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Williamstown, MA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
3h and 24min - Average sunshine in March:
5h and 6min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 54min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 18min - Average sunshine in October:
5h and 6min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 48min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days
Williamstown, MA
- Average sunshine days in January:
12 days - Average sunshine days in February:
9 days - Average sunshine days in March:
9.7 days - Average sunshine days in April:
10 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
11.7 days - Average sunshine days in September:
14.3 days - Average sunshine days in October:
11.8 days - Average sunshine days in November:
13.9 days - Average sunshine days in December:
11.7 days
The month with the most sunshine days is September (14.3 days).
The month with the least sunshine days is February (9 days).
Average UV index
Williamstown, MA
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Williamstown, MA
The month with the most cloud cover is February (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility
Williamstown, MA
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
