May weather forecastGrayson, KY
May
Weather in May
The last month of the spring, May, is a moderately hot month in Grayson, Kentucky, with an average temperature fluctuating between 54.7°F (12.6°C) and 75.9°F (24.4°C).Temperature
As May arrives, a rise in the average high-temperature is observed, moving from a comfortable 65.8°F (18.8°C) in April to a warm 75.9°F (24.4°C). During the month of May, Grayson's nighttime temperature lowers to an average of 54.7°F (12.6°C).Humidity
The average relative humidity in May is 77%.Rainfall
In Grayson, Kentucky, in May, during 18.4 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. In Grayson, Kentucky, during the entire year, the rain falls for 171.1 days and collects up to 31.18" (792mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May in Grayson is 14h and 16min.On the first day of the month, sunrise is at 6:33 am and sunset at 8:23 pm. On the last day of May, in Grayson, sunrise is at 6:09 am and sunset at 8:49 pm EDT.
Sunshine
In Grayson, the average sunshine in May is 9.1h.UV index
The months with the highest UV index in Grayson are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In May, the maximum UV index of 6 suggests these recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Grayson, KY
- Average high temperature in May: 75.9°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in May: 54.7°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in May
Grayson, KY
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Grayson, KY
- Average wind speed in May: 6mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in May
Grayson, KY
- Average humidity in May: 77%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (74%).
Average rainfall in May
Grayson, KY
- Average rainfall in May: 2.91"
The wettest months (with the highest rainfall) are April and December (3.07").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in May
Grayson, KY
- Average rainfall days in May: 18.4 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is November (10.7 days).
Average snowfall in May
Grayson, KY
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Grayson, KY
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Grayson, KY
- Average daylight in May: 14h and 18min
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: 9h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Grayson, KY
- Average sunshine days in May: 10 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in May
Grayson, KY
- 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
Grayson, KY
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Grayson, KY
- Average visibility in May: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
