May weather forecastWilliamstown, KY
May
Weather in May
The last month of the spring, May, is a moderately hot month in Williamstown, Kentucky, with an average temperature ranging between max 74.7°F (23.7°C) and min 55.8°F (13.2°C).Temperature
May signals a shift in the average high-temperature, moving from April's comfortable 64.8°F (18.2°C) to a moderately hot 74.7°F (23.7°C). Throughout May, Williamstown records an average temperature of 55.8°F (13.2°C) at night.Humidity
The average relative humidity in May in Williamstown, Kentucky, is 79%.Rainfall
In Williamstown, in May, during 18.8 rainfall days, 3.78" (96mm) of precipitation is typically accumulated. In Williamstown, during the entire year, the rain falls for 169.6 days and collects up to 36.02" (915mm) of precipitation.Snowfall
In Williamstown, snow does not fall in May through September.Daylight
In Williamstown, the average length of the day in May is 14h and 17min.On the first day of the month, sunrise is at 6:39 am and sunset at 8:30 pm. On the last day of May, sunrise is at 6:15 am and sunset at 8:56 pm EDT.
Sunshine
In Williamstown, the average sunshine in May is 8.8h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Minimize direct exposure to the Sun during midday when its radiation is at its peak. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Williamstown, KY
- Average high temperature in May: 74.7°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in May: 55.8°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in May
Williamstown, KY
- Average pressure in May: 29.98"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Williamstown, KY
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in May
Williamstown, KY
- Average humidity in May: 79%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (74%).
Average rainfall in May
Williamstown, KY
- Average rainfall in May: 3.78"
The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in May
Williamstown, KY
- Average rainfall days in May: 18.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in May
Williamstown, KY
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Williamstown, KY
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.3 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
Williamstown, 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: 8h and 48min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Williamstown, KY
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is October (17 days).
The month with the least sunshine days is February (10.5 days).
Average UV index in May
Williamstown, KY
- Average UV index in May: 5
The months with the highest UV index are 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
Williamstown, KY
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Williamstown, KY
- Average visibility in May: 5mi
The months with the highest visibility are March, April, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, May, July and December (5mi).
