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
The start of May brings a rise in the average high-temperature, moving from an enjoyable 61°F (16.1°C) in April to an agreeable 70.5°F (21.4°C). During May, the nighttime temperature averages to a chilly 48.9°F (9.4°C).Humidity
In May, the average relative humidity is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 19.7 days and typically aggregates up to 3.23" (82mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Williamsville aggregates 0.04" (1mm) of snow. In Williamsville, during the entire year, snow falls for 41.9 days and aggregates up to 36.5" (927mm) of snow.Daylight
In Williamsville, the average length of the day in May is 14h and 16min.On the first day of the month, sunrise is at 6:20 am and sunset at 8:09 pm. On the last day of May, sunrise is at 5:56 am and sunset at 8:35 pm EDT.
Sunshine
In Williamsville, the average sunshine in May is 8.9h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. 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: The maximum daily UV index, 5 in May, converts into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Williamsville in May?
What is the average humidity in May?
What is the rainiest month?
How much does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
When is the highest UV index?
What is the UV index reading in May?
Average temperature in May
Williamsville, VA
- Average high temperature in May: 70.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in May: 48.9°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in May
Williamsville, VA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Williamsville, VA
- Average wind speed in May: 5.3mph
The windiest month (with the highest average wind speed) is February (7.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in May
Williamsville, VA
- Average humidity in May: 79%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June and July (76%).
Average rainfall in May
Williamsville, VA
- Average rainfall in May: 3.23"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in May
Williamsville, VA
- Average rainfall days in May: 19.7 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in May
Williamsville, VA
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Williamsville, VA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Williamsville, VA
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in May
Williamsville, VA
- Average sunshine days in May: 9.2 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in May
Williamsville, VA
- 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, February, November and December (UV index 2).
Average cloud cover in May
Williamsville, VA
- Average cloud cover in May: 45
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and November (Cloud cover 36).
Average visibility in May
Williamsville, VA
- Average visibility in May: 4mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (5mi).
The months with the lowest visibility are May and September (4mi).
Williamsville, Virginia, USA
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