May weather forecast
Castleton, VA

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Weather in May

The last month of the spring, May, is a moderately hot month in Castleton, Virginia, with an average temperature fluctuating between 54.7°F (12.6°C) and 75.2°F (24°C).

Temperature

In Castleton, stepping into May brings a temperature increase, moving up from April's comfortable 65.5°F (18.6°C) to a warm 75.2°F (24°C). An average low-temperature of 54.7°F (12.6°C) is anticipated throughout the nights during May.

Humidity

The average relative humidity in May is 76%.

Rainfall

The month with the most rainfall in Castleton is May, when the rain falls for 16.1 days and typically aggregates up to 2.68" (68mm) of precipitation.

Snowfall

Months with snowfall in Castleton are January through May, November and December. May is the last month it regularly snows in Castleton. During 0.1 snowfall days, in May, Castleton aggregates 0.08" (2mm) of snow. Throughout the year, in Castleton, there are 15.4 snowfall days, and 9.17" (233mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 17min.
On the first day of May, sunrise is at 6:14 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:30 pm EDT.

Sunshine

In Castleton, the average sunshine in May is 8.9h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Castleton. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 6 in May translates into the following instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the temperature in May in Castleton?

The average high-temperature and low-temperature during May are 75.2°F (24°C) and 54.7°F (12.6°C) respectively.

What is the average humidity in May in Castleton?

The average relative humidity in May in Castleton is 76%.

What is the wettest month in Castleton?

The month with the most rainfall is May, when the rain falls for 16.1 days and typically aggregates up to 2.68" (68mm) of precipitation.

How many days does it rain in May in Castleton?

In Castleton, during May, the rain falls for 16.1 days and regularly aggregates up to 2.68" (68mm) of precipitation.

What is the last month it snows in Castleton?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Castleton aggregates 0.08" (2mm) of snow.

How many hours of daylight does Castleton have in May?

In May, the average day length in Castleton, Virginia, is 14h and 17min.

When is the sunrise / sunset in May in Castleton?

On the first day of May in Castleton, Virginia, sunrise is at 6:14 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:30 pm EDT.

How long on average sun shines in May in Castleton?

In Castleton, Virginia, the average sunshine duration in May is 8.9h.

What is the month with the highest UV index in Castleton?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index reading in May in Castleton?

In Castleton, Virginia, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Castleton, VA

Average temperature in May - Castleton, VA
  • Average high temperature in May: 75.2°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (41.4°F).

  • Average low temperature in May: 54.7°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in May
Castleton, VA

Average pressure in May - Castleton, VA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in May
Castleton, VA

Average wind speed in May - Castleton, VA
  • Average wind speed in May: 5.8mph

The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

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Average humidity in May
Castleton, VA

Average humidity in May - Castleton, VA
  • Average humidity in May: 76%

The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (72%).

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Average rainfall in May
Castleton, VA

Average rainfall in May - Castleton, VA
  • Average rainfall in May: 2.68"

The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.46").

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Average rainfall days in May
Castleton, VA

Average rainfall days in May - Castleton, VA
  • Average rainfall days in May: 16.1 days

The month with the highest number of rainy days is May (16.1 days).
The months with the least rainy days are January and November (8.3 days).

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Average snowfall in May
Castleton, VA

Average snowfall in May - Castleton, VA
  • Average snowfall in May: 0.08"

The month with the highest snowfall is January (2.36").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in May
Castleton, VA

Average snowfall days in May - Castleton, VA
  • Average snowfall days in May: 0.1 days

The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Castleton, VA

Average daylight in May / Average sunshine in May - Castleton, 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 30min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

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Average sunshine days in May
Castleton, VA

Average sunshine days in May - Castleton, VA
  • Average sunshine days in May: 12.5 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (12.5 days).

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Average UV index in May
Castleton, VA

Average UV index in May - Castleton, VA
  • Average UV index in May: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in May
Castleton, VA

Average cloud cover in May - Castleton, VA
  • Average cloud cover in May: 43

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in May
Castleton, VA

Average visibility in May - Castleton, VA
  • Average visibility in May: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

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Castleton, Virginia, USA

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