May weather forecastGrafton, WV
May
Weather in May
May brings a considerable increase in temperatures, ushering in the initial signs of the approaching summer. The city sees temperatures rise robustly, ranging from 51.1°F (10.6°C) to 71.6°F (22°C). Grafton's vistas take on a verdant hue as the extended sunshine hours and persistent rain foster prolific plant growth. The decrease in wind speed from April is accompanied by a slight increase in pressure. Meanwhile, days continue to lengthen, leading to an extended period of daylight that favors outdoor activities.Temperature
The average high-temperature increases in May, moving from an enjoyable 60.8°F (16°C) in April to a pleasant 71.6°F (22°C). The average temperature during May nights dips to a cool 51.1°F (10.6°C).Humidity
The average relative humidity in May is 79%.Rainfall
May is the month with the most rainfall. Rain falls for 20.8 days and accumulates 4.06" (103mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Grafton, West Virginia. May is the last month it regularly snows. During 0.3 snowfall days, in May, Grafton aggregates 0.67" (17mm) of snow. In Grafton, during the entire year, snow falls for 58.4 days and aggregates up to 31.26" (794mm) of snow.Daylight
In Grafton, the average length of the day in May is 14h and 21min.On the first day of May, sunrise is at 6:20 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:40 pm EDT.
Sunshine
In Grafton, the average sunshine in May is 8.7h.UV index
In Grafton, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Grafton, WV
- Average high temperature in May: 71.6°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in May: 51.1°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in May
Grafton, WV
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in May
Grafton, WV
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Grafton, WV
- Average humidity in May: 79%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in May
Grafton, WV
- Average rainfall in May: 4.06"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in May
Grafton, WV
- Average rainfall days in May: 20.8 days
The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is February (11.9 days).
Average snowfall in May
Grafton, WV
- Average snowfall in May: 0.67"
The month with the highest snowfall is January (7.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Grafton, WV
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grafton, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in May
Grafton, WV
- Average sunshine days in May: 8.8 days
The month with the most sunshine days is October (13.7 days).
The month with the least sunshine days is January (6.5 days).
Average UV index in May
Grafton, WV
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Grafton, WV
- Average cloud cover in May: 45
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in May
Grafton, WV
- Average visibility in May: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
