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
Williamstown's April weather brings a rise in high-temperatures, moving from a fresh 50.5°F (10.3°C) in March to an enjoyable 62.2°F (16.8°C). Throughout the month of April, the average temperature in Williamstown dips to a frosty 45.5°F (7.5°C) at night.Humidity
In Williamstown, the average relative humidity in April is 77%.Rainfall
In Williamstown, in April, during 15.8 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. Throughout the year, there are 161.3 rainfall days, and 31.26" (794mm) of precipitation is accumulated.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 0.2" (5mm) of snow. In Williamstown, during the entire year, snow falls for 35 days and aggregates up to 10.67" (271mm) of snow.Daylight
In Williamstown, the average length of the day in April is 13h and 16min.On the first day of April, sunrise is at 7:24 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 8:34 pm EDT.
Sunshine
In Williamstown, Indiana, the average sunshine in April is 7.2h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In April, a daily UV index of 4 turns into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
How many hours of daylight does Williamstown have in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Williamstown have in April?
How high is the UV index in April?
Average temperature in April
Williamstown, IN
- Average high temperature in April: 62.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in April: 45.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in April
Williamstown, IN
- Average pressure in April: 29.96"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Williamstown, IN
- Average wind speed in April: 9.4mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in April
Williamstown, IN
- Average humidity in April: 77%
The months with the highest relative humidity are January and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall in April
Williamstown, IN
- Average rainfall in April: 3.43"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in April
Williamstown, IN
- Average rainfall days in April: 15.8 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in April
Williamstown, IN
- Average snowfall in April: 0.2"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Williamstown, IN
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Williamstown, IN
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 7h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Williamstown, IN
- Average sunshine days in April: 12.2 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in April
Williamstown, IN
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Williamstown, IN
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Williamstown, IN
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Williamstown, Indiana, USA
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