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
An escalation in the average high-temperature is seen with the onset of May, moving from a refreshing 64.9°F (18.3°C) in April to a warm 74.8°F (23.8°C). An average low-temperature of 55.9°F (13.3°C) is recorded during the nights in May.Humidity
In West McLean, Virginia, the average relative humidity in May is 75%.Rainfall
In West McLean, during May, the rain falls for 10.8 days and regularly aggregates up to 0.75" (19mm) of precipitation. In West McLean, during the entire year, the rain falls for 109 days and collects up to 9.29" (236mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in May is 14h and 19min.On the first day of May, sunrise is at 6:09 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:27 pm EDT.
Sunshine
The average sunshine in May is 9h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 6 during May, leads to the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
How many hours of daylight does West McLean have in May?
When are sunrise and sunset in May?
How many hours of sunshine does West McLean have in May?
What are the months with the highest UV index?
What is the UV index reading in May in West McLean?
Average temperature in May
West McLean, VA
- Average high temperature in May: 74.8°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in May
West McLean, 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).
Average wind speed in May
West McLean, VA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in May
West McLean, VA
- Average humidity in May: 75%
The months with the highest relative humidity are October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in May
West McLean, VA
- Average rainfall in May: 0.75"
The wettest month (with the highest rainfall) is August (1.5").
The driest months (with the least rainfall) are January and September (0.51").
Average rainfall days in May
West McLean, VA
- Average rainfall days in May: 10.8 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (5.6 days).
Average snowfall in May
West McLean, VA
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
West McLean, VA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
West McLean, VA
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in May
West McLean, VA
- Average sunshine days in May: 16.6 days
The month with the most sunshine days is November (23 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in May
West McLean, 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, November and December (UV index 2).
Average cloud cover in May
West McLean, 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 30).
Average visibility in May
West McLean, VA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
West McLean, Virginia, USA
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