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 onset of April brings a rise in the average high-temperature, elevating from a chilly 48.9°F (9.4°C) in March to a refreshing 61°F (16.1°C). During April, Williamsville records a consistent average nighttime temperature of 41.4°F (5.2°C).Humidity
In April, the average relative humidity is 77%.Rainfall
In Williamsville, in April, during 15.7 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, in Williamsville, there are 161.8 rainfall days, and 29.53" (750mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Williamsville, in April, during 1.8 snowfall days, 1.14" (29mm) of snow is typically accumulated. In Williamsville, during the entire year, snow falls for 41.9 days and aggregates up to 36.5" (927mm) of snow.Daylight
The average length of the day in April is 13h and 13min.On the first day of April, sunrise is at 7:02 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 8:08 pm EDT.
Sunshine
In Williamsville, Virginia, the average sunshine in April is 8.7h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 4 in April translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Williamsville in April?
What is the average humidity in April?
How many days does it rain in April?
How many days does it snow in April?
What is the average length of the day in April in Williamsville?
When are sunrise and sunset in April?
How many hours of sunshine does Williamsville have in April?
What is the UV index intensity in April?
Average temperature in April
Williamsville, VA
- Average high temperature in April: 61°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in April: 41.4°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in April
Williamsville, VA
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in April
Williamsville, VA
- Average wind speed in April: 6.5mph
The windiest month (with the highest average wind speed) is February (7.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in April
Williamsville, VA
- Average humidity in April: 77%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June and July (76%).
Average rainfall in April
Williamsville, VA
- Average rainfall in April: 3.11"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in April
Williamsville, VA
- Average rainfall days in April: 15.7 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in April
Williamsville, VA
- Average snowfall in April: 1.14"
The month with the highest snowfall is February (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Williamsville, VA
- Average snowfall days in April: 1.8 days
The month with the highest number of snowfall days is January (10.8 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, VA
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in April
Williamsville, VA
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in April
Williamsville, VA
- Average UV index in April: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Williamsville, VA
- Average cloud cover in April: 43
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and November (Cloud cover 36).
Average visibility in April
Williamsville, VA
- Average visibility in April: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (5mi).
The months with the lowest visibility are May and September (4mi).
Williamsville, Virginia, USA
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