Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
Williamstown sees an increase in average high-temperatures during May, moving from a fresh 51.6°F (10.9°C) in April to an enjoyable 65.1°F (18.4°C). In Williamstown, in May, the average low-temperature is a chilly 45.1°F (7.3°C).Humidity
In Williamstown, Massachusetts, the average relative humidity in May is 78%.Rainfall
In Williamstown, Massachusetts, in May, it is raining for 17 days, with typically 3.31" (84mm) of accumulated precipitation. In Williamstown, during the entire year, the rain falls for 167.1 days and collects up to 35.98" (914mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Williamstown. During 0.5 snowfall days, in May, Williamstown aggregates 0.47" (12mm) of snow. In Williamstown, Massachusetts, during the entire year, snow falls for 66.1 days and aggregates up to 39.09" (993mm) of snow.Daylight
In Williamstown, the average length of the day in May is 14h and 39min.On the first day of May in Williamstown, Massachusetts, sunrise is at 5:46 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:23 pm EDT.
Sunshine
In Williamstown, the average sunshine in May is 8.2h.UV index
In Williamstown, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Frequently asked questions
What is the temperature in May in Williamstown?
What is the average humidity in May in Williamstown?
How many days does it rain in May in Williamstown?
What is the last month it snows in Williamstown?
What is the average length of the day in May in Williamstown?
What time are sunrise and sunset in May in Williamstown?
How long on average sun shines in May in Williamstown?
What is the UV index intensity in May in Williamstown?
Average temperature in May
Williamstown, MA
- Average high temperature in May: 65.1°F
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).
- Average low temperature in May: 45.1°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 in May
Williamstown, MA
- Average pressure in May: 30"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 in May
Williamstown, MA
- Average wind speed in May: 6.6mph
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 in May
Williamstown, MA
- Average humidity in May: 78%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Williamstown, MA
- Average rainfall in May: 3.31"
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 in May
Williamstown, MA
- Average rainfall days in May: 17 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 in May
Williamstown, MA
- Average snowfall in May: 0.47"
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 in May
Williamstown, MA
- Average snowfall days in May: 0.5 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 in May /
Average sunshine in May
Williamstown, MA
- Average daylight in May: 14h and 4min
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 May: 8h and 1min
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 in May
Williamstown, MA
- Average sunshine days in May: 11.8 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 in May
Williamstown, MA
- Average UV index in May: 4
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 in May
Williamstown, MA
- Average cloud cover in May: 50
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 in May
Williamstown, MA
- Average visibility in May: 5mi
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).
Williamstown, Massachusetts, USA
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