Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The shift into April is marked by a rise in the average high-temperature, moving from March's frosty 46.4°F (8°C) to a refreshing 58.6°F (14.8°C). April sees the temperature falling to a mean low of 40.3°F (4.6°C).Humidity
April is the least humid month, with an average relative humidity of 76%.Rainfall
In Williamstown, in April, it is raining for 15.2 days, with typically 2.28" (58mm) of accumulated precipitation. In Williamstown, during the entire year, the rain falls for 148.4 days and collects up to 25.55" (649mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Williamstown, in April, snow falls for 0.9 days, with typically accumulated 0.31" (8mm) of snow. In Williamstown, during the entire year, snow falls for 26.2 days and aggregates up to 12.32" (313mm) of snow.Daylight
The average length of the day in April is 13h and 19min.On the first day of April, sunrise is at 6:48 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 8:01 pm EDT.
Sunshine
In Williamstown, the average sunshine in April is 7.8h.UV index
The average daily maximum UV index in April in Williamstown is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 3 in April interprets into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the least humid month?
What is the average humidity in April?
How much does it rain in April?
How many days does it snow in April?
What is the average length of the day in April?
When are sunrise and sunset in April?
How many hours of sunshine does Williamstown have in April?
What is the UV index reading in April?
Average temperature in April
Williamstown, PA
- Average high temperature in April: 58.6°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in April: 40.3°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in April
Williamstown, PA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Williamstown, PA
- Average wind speed in April: 8.3mph
The windiest months (with the highest average wind speed) are March and April (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in April
Williamstown, PA
- Average humidity in April: 76%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in April
Williamstown, PA
- Average rainfall in April: 2.28"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days in April
Williamstown, PA
- Average rainfall days in April: 15.2 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in April
Williamstown, PA
- Average snowfall in April: 0.31"
The month with the highest snowfall is March (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Williamstown, PA
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Williamstown, PA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in April
Williamstown, PA
- Average sunshine days in April: 13.5 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in April
Williamstown, PA
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Williamstown, PA
- Average cloud cover in April: 48
The months with the most cloud cover are February and December (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in April
Williamstown, PA
- Average visibility in April: 6mi
The months with the highest visibility are January, March, April, June, July, November and December (6mi).
The months with the lowest visibility are February, May, August, September and October (5mi).
Williamstown, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location