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 arrival brings a change in high-temperatures, moving from a wintry 40.6°F (4.8°C) in March to a cool 52.7°F (11.5°C). The average temperature drops to an icy 36.5°F (2.5°C) during the night in the month of April.Humidity
In Williamsville, the average relative humidity in April is 77%.Rainfall
In April, the rain falls for 13.8 days. Throughout April, 1.38" (35mm) of precipitation is accumulated. In Williamsville, during the entire year, the rain falls for 139.2 days and collects up to 14.84" (377mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Williamsville, in April, during 3.5 snowfall days, 0.87" (22mm) of snow is typically accumulated. In Williamsville, during the entire year, snow falls for 62.1 days and aggregates up to 12.68" (322mm) of snow.Daylight
In Williamsville, the average length of the day in April is 13h and 26min.On the first day of April, sunrise is at 6:55 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 8:15 pm EDT.
Sunshine
In April, the average sunshine is 7.2h.UV index
The average daily maximum UV index in April in Williamsville 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 average person.Note: In April, a daily maximum UV index of 3 leads to the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. 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 Williamsville in April?
What is the average humidity in April in Williamsville?
How much does it rain in Williamsville in April?
How much does it snow in Williamsville in April?
How many hours of daylight does Williamsville have in April?
When is the sunrise / sunset in April in Williamsville?
How many hours of sunshine does Williamsville have in April?
What is the UV index reading in April in Williamsville?
Average temperature in April
Williamsville, NY
- Average high temperature in April: 52.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in April: 36.5°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in April
Williamsville, NY
- Average pressure in April: 29.97"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Williamsville, NY
- Average wind speed in April: 9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in April
Williamsville, NY
- Average humidity in April: 77%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in April
Williamsville, NY
- Average rainfall in April: 1.38"
The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in April
Williamsville, NY
- Average rainfall days in April: 13.8 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in April
Williamsville, NY
- Average snowfall in April: 0.87"
The months with the highest snowfall are January and February (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Williamsville, NY
- Average snowfall days in April: 3.5 days
The month with the highest number of snowfall days is January (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Williamsville, NY
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in April: 7h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in April
Williamsville, NY
- Average sunshine days in April: 12.6 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (10.2 days).
Average UV index in April
Williamsville, NY
- 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 and December (UV index 1).
Average cloud cover in April
Williamsville, NY
- Average cloud cover in April: 52
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in April
Williamsville, NY
- Average visibility in April: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Williamsville, New York, USA
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