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 Mount Vernon, the onset of April comes with an increased average high-temperature, moving from March's chilly 45.5°F (7.5°C) to a refreshing 57.9°F (14.4°C). In April, Mount Vernon experiences an average nighttime temperature of 41°F (5°C).Humidity
In Mount Vernon, the average relative humidity in April is 75%.Rainfall
In Mount Vernon, during April, the rain falls for 15.9 days and regularly aggregates up to 3.43" (87mm) of precipitation. In Mount Vernon, during the entire year, the rain falls for 147.9 days and collects up to 31.57" (802mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Mount Vernon. April is the last month it regularly snows. During 1.4 snowfall days, in April, Mount Vernon aggregates 0.75" (19mm) of snow. In Mount Vernon, during the entire year, snow falls for 44 days and aggregates up to 18.35" (466mm) of snow.Daylight
In Mount Vernon, the average length of the day in April is 13h and 23min.On the first day of April in Mount Vernon, sunrise is at 6:46 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:03 pm CDT.
Sunshine
In April, the average sunshine is 7.5h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in April converts into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the average April temperature in Mount Vernon?
What is the average humidity in April in Mount Vernon?
How many days does it rain in April in Mount Vernon?
What is the last month it snows in Mount Vernon?
What is the average length of the day in April in Mount Vernon?
What time are sunrise and sunset in April in Mount Vernon?
How many hours of sunshine does Mount Vernon have in April?
What is the UV index reading in April in Mount Vernon?
Average temperature in April
Mount Vernon, IA
- Average high temperature in April: 57.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in April: 41°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure in April
Mount Vernon, IA
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Mount Vernon, IA
- Average wind speed in April: 10.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in April
Mount Vernon, IA
- Average humidity in April: 75%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Mount Vernon, IA
- Average rainfall in April: 3.43"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in April
Mount Vernon, IA
- Average rainfall days in April: 15.9 days
The month with the highest number of rainy days is May (19 days).
The months with the least rainy days are January and February (5.2 days).
Average snowfall in April
Mount Vernon, IA
- Average snowfall in April: 0.75"
The month with the highest snowfall is January (5.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Mount Vernon, IA
- Average snowfall days in April: 1.4 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Mount Vernon, IA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in April: 7h and 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in April
Mount Vernon, IA
- Average sunshine days in April: 11.2 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in April
Mount Vernon, IA
- Average UV index in April: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Mount Vernon, IA
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in April
Mount Vernon, IA
- 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).
Mount Vernon, Iowa, USA
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