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 commencement of April sees a shift in the average high-temperature, moving from a frosty 45°F (7.2°C) in March to a moderate 56.3°F (13.5°C). Throughout April, Iona's nights cool down to an average of 38.3°F (3.5°C).Humidity
The average relative humidity in April in Iona is 66%.Rainfall
In Iona, in April, it is raining for 13.7 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, there are 107.6 rainfall days, and 17.83" (453mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows in Iona. During 3.4 snowfall days, in April, Iona aggregates 1.89" (48mm) of snow. In Iona, during the entire year, snow falls for 50.9 days and aggregates up to 17.87" (454mm) of snow.Daylight
In Iona, South Dakota, the average length of the day in April is 13h and 28min.On the first day of the month, sunrise is at 7:17 am and sunset at 8:04 pm. On the last day of April, sunrise is at 6:30 am and sunset at 8:39 pm CDT.
Sunshine
In Iona, the average sunshine in April is 7.9h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during April translates into the following guidance:
Make use of precautions - It is urged to ward off sun damage. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Opt for tightly woven and loose clothing to enhance protection from the Sun. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are April temperatures in Iona?
What is the average humidity in April in Iona?
How many days does it rain in April in Iona?
What is the last month it snows in Iona?
What is the average length of the day in April in Iona?
What time are sunrise and sunset in April in Iona?
How many hours of sunshine does Iona have in April?
What is the UV index reading in April in Iona?
Average temperature in April
Iona, SD
- Average high temperature in April: 56.3°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in April: 38.3°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in April
Iona, SD
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in April
Iona, SD
- Average wind speed in April: 11.3mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).
Average humidity in April
Iona, SD
- Average humidity in April: 66%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is September (58%).
Average rainfall in April
Iona, SD
- Average rainfall in April: 1.89"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is November (0.55").
Average rainfall days in April
Iona, SD
- Average rainfall days in April: 13.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in April
Iona, SD
- Average snowfall in April: 1.89"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Iona, SD
- Average snowfall days in April: 3.4 days
The months with the highest number of snowfall days are January and February (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
Iona, SD
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in April: 7h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in April
Iona, SD
- Average sunshine days in April: 11.8 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in April
Iona, SD
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in April
Iona, SD
- Average cloud cover in April: 42
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in April
Iona, SD
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Iona, South Dakota, USA
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