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
Herndon's transition into April sees a rise in the average high-temperature, advancing from a cool 51.1°F (10.6°C) in March to a comfortable 62.8°F (17.1°C). Throughout the month of April, the average temperature in Herndon dips to a frosty 43.5°F (6.4°C) at night.Humidity
The average relative humidity in April is 78%.Rainfall
In April, in Herndon, the rain falls for 17.3 days. Throughout April, 2.99" (76mm) of precipitation is accumulated. In Herndon, West Virginia, during the entire year, the rain falls for 180.7 days and collects up to 32.24" (819mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Herndon, West Virginia, during April, snow falls for 1.9 days and regularly aggregates up to 1.3" (33mm) of snow. In Herndon, during the entire year, snow falls for 50.3 days and aggregates up to 27.09" (688mm) of snow.Daylight
In April, the average length of the day is 13h and 11min.On the first day of the month, sunrise is at 7:09 am and sunset at 7:48 pm. On the last day of April, sunrise is at 6:30 am and sunset at 8:14 pm EDT.
Sunshine
In April, the average sunshine is 8.3h.UV index
In April, the average daily maximum UV index in Herndon is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In April, an average UV index of 4 transforms into the following instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What is the average April temperature in Herndon?
What is the average humidity in April in Herndon?
How many days does it rain in April in Herndon?
How much does it snow in Herndon in April?
How many hours of daylight does Herndon have in April?
When are sunrise and sunset in April in Herndon?
How many hours of sunshine does Herndon have in April?
How high is the UV index in April in Herndon?
Average temperature in April
Herndon, WV
- Average high temperature in April: 62.8°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in April: 43.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in April
Herndon, WV
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in April
Herndon, WV
- Average wind speed in April: 7.1mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in April
Herndon, WV
- Average humidity in April: 78%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in April
Herndon, WV
- Average rainfall in April: 2.99"
The wettest months (with the highest rainfall) are February and May (3.43").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in April
Herndon, WV
- Average rainfall days in April: 17.3 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in April
Herndon, WV
- Average snowfall in April: 1.3"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Herndon, WV
- Average snowfall days in April: 1.9 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Herndon, WV
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Herndon, WV
- Average sunshine days in April: 9.9 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in April
Herndon, WV
- Average UV index in April: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Herndon, WV
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in April
Herndon, WV
- Average visibility in April: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Herndon, West Virginia, USA
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