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
As April transitions into May, Williston sees a clear rise in the average high-temperature, escalating from a chilly 49.6°F (9.8°C) to a refreshing 64.9°F (18.3°C). During May, the nighttime temperature averages to a chilly 44.4°F (6.9°C).Humidity
April and May, with an average relative humidity of 76%, are the least humid months.Rainfall
In Williston, in May, during 17.1 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, there are 161.7 rainfall days, and 29.33" (745mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Williston. During 0.8 snowfall days, in May, Williston aggregates 0.63" (16mm) of snow. In Williston, Vermont, during the entire year, snow falls for 94.7 days and aggregates up to 50.91" (1293mm) of snow.Daylight
In Williston, the average length of the day in May is 14h and 49min.On the first day of May, sunrise is at 5:41 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:29 pm EDT.
Sunshine
In Williston, the average sunshine in May is 8.2h.UV index
The months with the highest UV index in Williston are May through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 5 in May translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Williston in May?
What are the least humid months in Williston?
What is the average humidity in May in Williston?
How much does it rain in Williston in May?
What is the last month it snows in Williston?
How many hours of daylight does Williston have in May?
When is the sunrise / sunset in May in Williston?
How many hours of sunshine does Williston have in May?
When is the highest UV index in Williston?
What is the UV index reading in May in Williston?
Average temperature in May
Williston, VT
- Average high temperature in May: 64.9°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in May: 44.4°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in May
Williston, VT
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Williston, VT
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Williston, VT
- Average humidity in May: 76%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in May
Williston, VT
- Average rainfall in May: 2.87"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in May
Williston, VT
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in May
Williston, VT
- Average snowfall in May: 0.63"
The month with the highest snowfall is February (11.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Williston, VT
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Williston, VT
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in May
Williston, VT
- Average sunshine days in May: 11.9 days
The month with the most sunshine days is September (15.9 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in May
Williston, VT
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Williston, VT
- Average cloud cover in May: 47
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in May
Williston, VT
- Average visibility in May: 5mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
Williston, Vermont, USA
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