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
In Harpers Ferry, the average high-temperature in April increases from a cold 42.1°F (5.6°C) in March to a fresh 54.7°F (12.6°C). During the month of April, an average temperature of 37.4°F (3°C) is noted during the nights.Humidity
In Harpers Ferry, Iowa, the average relative humidity in April is 77%.Rainfall
In April, the rain falls for 13.9 days. Throughout April, 2.32" (59mm) of precipitation is accumulated. Throughout the year, there are 124.7 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Harpers Ferry. In April, in Harpers Ferry, it is snowing for 1.8 days. Throughout April, 1.3" (33mm) of snow is accumulated. Throughout the year, there are 44.5 snowfall days, and 15.47" (393mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 26min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:31 pm. On the last day of April, sunrise is at 5:58 am and sunset at 8:05 pm CDT.
Sunshine
The average sunshine in April is 7.2h.UV index
The average daily maximum UV index in April in Harpers Ferry is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 3 in April translates into this advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature in Harpers Ferry?
What is the average humidity in April in Harpers Ferry?
How much does it rain in Harpers Ferry in April?
How much does it snow in Harpers Ferry in April?
What is the average length of the day in April in Harpers Ferry?
When are sunrise and sunset in April in Harpers Ferry?
How long on average sun shines in April in Harpers Ferry?
How high is the UV index in April in Harpers Ferry?
Average temperature in April
Harpers Ferry, IA
- Average high temperature in April: 54.7°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in April: 37.4°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in April
Harpers Ferry, IA
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Harpers Ferry, IA
- Average wind speed in April: 9.9mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in April
Harpers Ferry, IA
- Average humidity in April: 77%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (76%).
Average rainfall in April
Harpers Ferry, IA
- Average rainfall in April: 2.32"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in April
Harpers Ferry, IA
- Average rainfall days in April: 13.9 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in April
Harpers Ferry, IA
- Average snowfall in April: 1.3"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Harpers Ferry, IA
- Average snowfall days in April: 1.8 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Harpers Ferry, IA
- 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 0min).
- Average sunshine in April: 7h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in April
Harpers Ferry, IA
- Average sunshine days in April: 13.7 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in April
Harpers Ferry, IA
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in April
Harpers Ferry, IA
- Average cloud cover in April: 50
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in April
Harpers Ferry, IA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Harpers Ferry, Iowa, USA
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