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's onset brings a rise in the average high-temperature, moving from a frosty 44.2°F (6.8°C) in March to a refreshing 56.5°F (13.6°C). Throughout the month of April, Williamsport witnesses an average temperature of 37.8°F (3.2°C).Humidity
April and July, with an average relative humidity of 77%, are the least humid months.Rainfall
The month with the most rainfall is April, when the rain falls for 15 days and typically aggregates up to 1.93" (49mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Williamsport. April is the last month it regularly snows. During 0.9 snowfall days, in April, Williamsport aggregates 0.16" (4mm) of snow. In Williamsport, during the entire year, snow falls for 39.1 days and aggregates up to 7.56" (192mm) of snow.Daylight
In April, the average length of the day is 13h and 21min.On the first day of April, sunrise is at 6:49 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 8:04 pm EDT.
Sunshine
The average sunshine in April in Williamsport is 7.7h.UV index
In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 3 during April leads to these advisories:
Heed the precautions - Suggestions to avoid sunburn are made. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the least humid month in Williamsport?
What is the average humidity in April in Williamsport?
What is the wettest month?
How many days does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Williamsport have in April?
What is the UV index reading in April?
Average temperature in April
Williamsport, PA
- Average high temperature in April: 56.5°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in April: 37.8°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in April
Williamsport, PA
- Average pressure in April: 29.98"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
Williamsport, PA
- Average wind speed in April: 7.5mph
The windiest months (with the highest average wind speed) are January, March and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in April
Williamsport, PA
- Average humidity in April: 77%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in April
Williamsport, PA
- Average rainfall in April: 1.93"
The wettest month (with the highest rainfall) is April (1.93").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in April
Williamsport, PA
- Average rainfall days in April: 15 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in April
Williamsport, PA
- Average snowfall in April: 0.16"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Williamsport, PA
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Williamsport, PA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in April
Williamsport, PA
- Average sunshine days in April: 12.9 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in April
Williamsport, PA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in April
Williamsport, PA
- Average cloud cover in April: 50
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in April
Williamsport, PA
- Average visibility in April: 6mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is September (4mi).
Williamsport, Pennsylvania, USA
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