May weather forecastCastleton, VT
May
Weather in May
May, considered as the advent of summer, brings along warmer temperatures, clarity in the sky, and minimal chances of snowfall. The city basks in the sunlight with an average of 8.4 hours of sunshine per day. The amount of snowfall falls to a meager 0.28in, indicating an end to the snowfall season. The weather conditions become conducive for outdoor activities with the mercury touching 66.2°F (19°C). Even the low temperatures are bearable, giving residents a break from the harshness of winter.Temperature
As May arrives, Castleton's weather displays a notable increase in high-temperatures, climbing from April's cool 51.4°F (10.8°C) to a comfortable 66.2°F (19°C). During May, the nighttime temperature averages of 45°F (7.2°C).Humidity
April and May, with an average relative humidity of 75%, are the least humid months in Castleton.Rainfall
In Castleton, during May, the rain falls for 12.8 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Castleton, during the entire year, the rain falls for 112.5 days and collects up to 10.75" (273mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Castleton. During 0.4 snowfall days, in May, Castleton aggregates 0.28" (7mm) of snow. Throughout the year, in Castleton, there are 44.2 snowfall days, and 11.42" (290mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 44min.On the first day of May in Castleton, sunrise is at 5:43 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 5:14 am and sunset at 8:26 pm EDT.
Sunshine
In Castleton, the average sunshine in May is 8.4h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in Castleton. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Castleton, VT
- Average high temperature in May: 66.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in May: 45°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in May
Castleton, VT
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Castleton, VT
- Average wind speed in May: 6.2mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Castleton, VT
- Average humidity in May: 75%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in May
Castleton, VT
- Average rainfall in May: 1.02"
The wettest month (with the highest rainfall) is June (1.22").
The driest months (with the least rainfall) are March and September (0.67").
Average rainfall days in May
Castleton, VT
- Average rainfall days in May: 12.8 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in May
Castleton, VT
- Average snowfall in May: 0.28"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Castleton, VT
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Castleton, VT
- Average daylight in May: 14h and 42min
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 24min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in May
Castleton, VT
- Average sunshine days in May: 16.1 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is February (15.6 days).
Average UV index in May
Castleton, 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
Castleton, VT
- Average cloud cover in May: 47
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 36).
Average visibility in May
Castleton, VT
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
