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
April brings a temperature increase, with average high-temperatures moving from March's chilly 46.4°F (8°C) to a moderate 58.6°F (14.8°C). An average low-temperature of 40.3°F (4.6°C) is noted during the month of April.Humidity
April is the least humid month, with an average relative humidity of 76%.Rainfall
In Williamstown, during April, the rain falls for 15.2 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, there are 148.4 rainfall days, and 25.55" (649mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Williamstown. In Williamstown, in April, snow falls for 0.9 days, with typically accumulated 0.31" (8mm) of snow. Throughout the year, in Williamstown, there are 26.2 snowfall days, and 12.32" (313mm) of snow is accumulated.Daylight
In Williamstown, the average length of the day in April is 13h and 19min.On the first day of April in Williamstown, 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
The average sunshine in April in Williamstown is 7.8h.UV index
The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 3 during April translates into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What is the average April temperature in Williamstown?
What is the least humid month in Williamstown?
What is the average humidity in April in Williamstown?
How much does it rain in Williamstown in April?
How many days does it snow in April in Williamstown?
What is the average length of the day in April in Williamstown?
What time are sunrise and sunset in April in Williamstown?
How long on average sun shines in April in Williamstown?
What is the UV index reading in April in Williamstown?
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
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