April weather forecastWilliamstown, KY
April
Weather in April
April in Williamstown, Kentucky, is a refreshing spring month, with an average temperature varying between 64.8°F (18.2°C) and 45.5°F (7.5°C).Temperature
With the onset of April, Williamstown's average high-temperature experiences a rise, moving from March's fresh 52.3°F (11.3°C) to an enjoyable 64.8°F (18.2°C). During April nights, Williamstown witnesses a consistent average temperature of 45.5°F (7.5°C).Humidity
In April, the average relative humidity is 76%.Rainfall
April is the month with the most rainfall. Rain falls for 16.6 days and accumulates 3.82" (97mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 0.9 snowfall days, in April, Williamstown aggregates 0.31" (8mm) of snow. In Williamstown, during the entire year, snow falls for 37 days and aggregates up to 12.87" (327mm) of snow.Daylight
The average length of the day in April is 13h and 14min.On the first day of April in Williamstown, sunrise is at 7:21 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 8:29 pm EDT.
Sunshine
The average sunshine in April is 7.6h.UV index
The average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In April, the maximum UV index of 4 translates into these guidelines:
Be vigilant - Suggestions to stave off sun damage are provided. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Consider carefully! The reflective quality of snow 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 April
Williamstown, KY
- Average high temperature in April: 64.8°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 April: 45.5°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 April
Williamstown, KY
- Average pressure in April: 29.97"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 April
Williamstown, KY
- Average wind speed in April: 8.1mph
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 April
Williamstown, KY
- Average humidity in April: 76%
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 April
Williamstown, KY
- Average rainfall in April: 3.82"
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 April
Williamstown, KY
- Average rainfall days in April: 16.6 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 April
Williamstown, KY
- Average snowfall in April: 0.31"
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 April
Williamstown, KY
- Average snowfall days in April: 0.9 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 April /
Average sunshine in April
Williamstown, KY
- Average daylight in April: 13h and 12min
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 April: 7h and 36min
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 April
Williamstown, KY
- Average sunshine days in April: 11.5 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 April
Williamstown, KY
- Average UV index in April: 4
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 April
Williamstown, KY
- Average cloud cover in April: 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 April
Williamstown, KY
- Average visibility in April: 6mi
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).
