May weather forecastHarpers Ferry, WV
May
Weather in May
May, the last month of the spring in Harpers Ferry, is an agreeable month, with temperature in the range of an average low of 53.1°F (11.7°C) and an average high of 73.2°F (22.9°C).Temperature
Harpers Ferry sees an increase in average high-temperatures during May, moving from an enjoyable 63.5°F (17.5°C) in April to a pleasant 73.2°F (22.9°C). Harpers Ferry's May nights cool down to an average low-temperature of 53.1°F (11.7°C).Humidity
In May, the average relative humidity is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 19.3 days and typically aggregates up to 3.35" (85mm) of precipitation.Snowfall
In Harpers Ferry, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 21min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:04 pm. On the last day of May, sunrise is at 5:46 am and sunset at 8:31 pm EDT.
Sunshine
In May, the average sunshine is 8.8h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Harpers Ferry. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 6 in May leads to these recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Harpers Ferry, WV
- Average high temperature in May: 73.2°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in May: 53.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in May
Harpers Ferry, WV
- 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
Harpers Ferry, WV
- Average wind speed in May: 5.8mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in May
Harpers Ferry, WV
- Average humidity in May: 78%
The month with the highest relative humidity is October (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in May
Harpers Ferry, WV
- Average rainfall in May: 3.35"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in May
Harpers Ferry, WV
- Average rainfall days in May: 19.3 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in May
Harpers Ferry, WV
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Harpers Ferry, WV
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.9 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
Harpers Ferry, WV
- Average daylight in May: 14h and 24min
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: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 0min).
Average sunshine days in May
Harpers Ferry, WV
- Average sunshine days in May: 10.7 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in May
Harpers Ferry, WV
- 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).
Average cloud cover in May
Harpers Ferry, WV
- Average cloud cover in May: 45
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in May
Harpers Ferry, WV
- Average visibility in May: 5mi
The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).
