May weather forecastSouth Williamson, KY
May
Weather in May
The last month of the spring, May, is a warm month in South Williamson, Kentucky, with temperature in the range of an average high of 75.6°F (24.2°C) and an average low of 54°F (12.2°C).Temperature
South Williamson experiences a temperature shift with the start of May, with average high-temperatures moving from a refreshing 65.8°F (18.8°C) in April to a warm 75.6°F (24.2°C). May nights are characterized by a significant departure from the daytime highs, dropping to an average temperature of 54°F (12.2°C).Humidity
In South Williamson, the average relative humidity in May is 78%.Rainfall
The months with the most rainfall are February and May, with an average 3.27" (83mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, South Williamson aggregates 0.2" (5mm) of snow. In South Williamson, during the entire year, snow falls for 32.9 days and aggregates up to 16.81" (427mm) of snow.Daylight
In May, the average length of the day is 14h and 13min.On the first day of the month, sunrise is at 6:32 am and sunset at 8:19 pm. On the last day of May, sunrise is at 6:09 am and sunset at 8:44 pm EDT.
Sunshine
In May, the average sunshine is 9.3h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. To guard against the harmful effects of the Sun, minimize exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
South Williamson, KY
- Average high temperature in May: 75.6°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in May
South Williamson, KY
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in May
South Williamson, KY
- Average wind speed in May: 5.5mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in May
South Williamson, KY
- Average humidity in May: 78%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are July, August and November (75%).
Average rainfall in May
South Williamson, KY
- Average rainfall in May: 3.27"
The wettest months (with the highest rainfall) are February and May (3.27").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in May
South Williamson, KY
- Average rainfall days in May: 18.2 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in May
South Williamson, KY
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
South Williamson, KY
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
South Williamson, KY
- Average daylight in May: 14h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 9h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
South Williamson, KY
- Average sunshine days in May: 10.5 days
The month with the most sunshine days is October (17.7 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in May
South Williamson, KY
- Average UV index in May: 5
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
South Williamson, KY
- Average cloud cover in May: 41
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
South Williamson, KY
- Average visibility in May: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
