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
In Williamstown, the onset of May comes with an increased average high-temperature, moving from April's cool 51.1°F (10.6°C) to a refreshing 65.1°F (18.4°C). Williamstown's temperature tends to fall to an average low of 45.7°F (7.6°C) during the nights of May.Humidity
April and May, with an average relative humidity of 79%, are the least humid months.Rainfall
The months with the most rainfall are May and October, with an average 3.66" (93mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Williamstown. During 0.3 snowfall days, in May, Williamstown aggregates 0.08" (2mm) of snow. Throughout the year, there are 88.5 snowfall days, and 46.89" (1191mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 43min.On the first day of May in Williamstown, sunrise is at 5:55 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 8:37 pm EDT.
Sunshine
In May, the average sunshine is 8.6h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 5 during May translates into the following directions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What are the least humid months?
What is the average humidity in May?
What is the wettest month?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Williamstown have in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Williamstown, NY
- Average high temperature in May: 65.1°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in May: 45.7°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in May
Williamstown, NY
- Average pressure in May: 29.98"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, NY
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in May
Williamstown, NY
- Average humidity in May: 79%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in May
Williamstown, NY
- Average rainfall in May: 3.66"
The wettest months (with the highest rainfall) are May and October (3.66").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in May
Williamstown, NY
- Average rainfall days in May: 17.7 days
The month with the highest number of rainy days is October (18.5 days).
The month with the least rainy days is February (8.5 days).
Average snowfall in May
Williamstown, NY
- Average snowfall in May: 0.08"
The month with the highest snowfall is January (11.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Williamstown, NY
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (21.4 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, NY
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 2h and 30min).
Average sunshine days in May
Williamstown, NY
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is February (4.6 days).
Average UV index in May
Williamstown, NY
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in May
Williamstown, NY
- Average cloud cover in May: 45
The months with the most cloud cover are January and February (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
Williamstown, NY
- Average visibility in May: 5mi
The months with the highest visibility are April and October (6mi).
The months with the lowest visibility are January and February (4mi).
Williamstown, New York, USA
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