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 April, the average high-temperature increases from a chilly 47.8°F (8.8°C) in March to a mild 59.4°F (15.2°C). Castana records an average temperature drop to a wintry 42.1°F (5.6°C) in April.Humidity
April and October, with an average relative humidity of 66%, are the least humid months.Rainfall
In Castana, during April, the rain falls for 13.4 days and regularly aggregates up to 2.17" (55mm) of precipitation. In Castana, during the entire year, the rain falls for 117.6 days and collects up to 21.89" (556mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. April is the last month it regularly snows. During 1.5 snowfall days, in April, Castana aggregates 1.14" (29mm) of snow. Throughout the year, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.Daylight
The average length of the day in April in Castana is 13h and 23min.On the first day of the month, sunrise is at 7:04 am and sunset at 7:49 pm. On the last day of April, sunrise is at 6:19 am and sunset at 8:22 pm CDT.
Sunshine
In Castana, the average sunshine in April is 8.1h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In April, an average UV index of 4 transforms into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the least humid month?
What is the average humidity in April?
How much does it rain in Castana in April?
What is the last month it snows?
How many hours of daylight does Castana have in April?
When is the sunrise / sunset in April?
How long on average sun shines in April?
What is the UV index reading in April in Castana?
Average temperature in April
Castana, IA
- Average high temperature in April: 59.4°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in April: 42.1°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 (15.1°F).
Average pressure in April
Castana, 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
Castana, IA
- Average wind speed in April: 10.9mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in April
Castana, IA
- Average humidity in April: 66%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).
Average rainfall in April
Castana, IA
- Average rainfall in April: 2.17"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in April
Castana, IA
- Average rainfall days in April: 13.4 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in April
Castana, IA
- Average snowfall in April: 1.14"
The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Castana, IA
- Average snowfall days in April: 1.5 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Castana, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in April
Castana, IA
- Average sunshine days in April: 14 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).
Average UV index in April
Castana, 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 February and December (UV index 1).
Average cloud cover in April
Castana, IA
- Average cloud cover in April: 43
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in April
Castana, 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).
Castana, Iowa, USA
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