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
April's arrival signals a temperature shift, moving from a frosty 48.7°F (9.3°C) in March to a moderate 59.9°F (15.5°C). In River Sioux, the average low-temperature during the month of April is a cold 42.4°F (5.8°C).Humidity
In River Sioux, the average relative humidity in April is 67%.Rainfall
In River Sioux, Iowa, in April, it is raining for 14.3 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 125.1 rainfall days, and 22.64" (575mm) of precipitation is accumulated.Snowfall
Months with snowfall in River Sioux are January through May, October through December. In River Sioux, in April, during 1.2 snowfall days, 0.98" (25mm) of snow is typically accumulated. In River Sioux, during the entire year, snow falls for 32.8 days and aggregates up to 11.97" (304mm) of snow.Daylight
In April, the average length of the day in River Sioux is 13h and 23min.On the first day of April, sunrise is at 7:05 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:22 pm CDT.
Sunshine
The average sunshine in April is 8.3h.UV index
In April, the average daily maximum UV index in River Sioux is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In April, the maximum UV index of 4 suggests this advice:
Take necessary precautions - Defending against sun damage is advocated. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in River Sioux 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?
How many hours of daylight does River Sioux have in April?
When are sunrise and sunset in April?
How long on average sun shines in April?
How high is the UV index in April in River Sioux?
Average temperature in April
River Sioux, IA
- Average high temperature in April: 59.9°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in April
River Sioux, IA
- Average pressure in April: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in April
River Sioux, IA
- Average wind speed in April: 10.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in April
River Sioux, IA
- Average humidity in April: 67%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (66%).
Average rainfall in April
River Sioux, IA
- Average rainfall in April: 2.13"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in April
River Sioux, IA
- Average rainfall days in April: 14.3 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in April
River Sioux, IA
- Average snowfall in April: 0.98"
The month with the highest snowfall is January (2.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
River Sioux, IA
- Average snowfall days in April: 1.2 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
River Sioux, 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: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in April
River Sioux, IA
- Average sunshine days in April: 13.2 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in April
River Sioux, IA
- Average UV index in April: 4
The months with the highest UV index are June, July 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
River Sioux, IA
- 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 July (Cloud cover 25).
Average visibility in April
River Sioux, IA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
River Sioux, Iowa, USA
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