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 arrival of April in Decorah brings an increase in high-temperatures, moving from an icy 41°F (5°C) in March to a cool 54°F (12.2°C). During the month of April, the nighttime temperature in Decorah falls to an average of 37.4°F (3°C).Humidity
The average relative humidity in April in Decorah is 77%.Rainfall
In April, the rain falls for 16.5 days. Throughout April, 3.39" (86mm) of precipitation is accumulated. Throughout the year, in Decorah, there are 149 rainfall days, and 30.59" (777mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Decorah. In Decorah, Iowa, during April, snow falls for 3.8 days and regularly aggregates up to 2.44" (62mm) of snow. Throughout the year, in Decorah, there are 60.9 snowfall days, and 24.37" (619mm) of snow is accumulated.Daylight
In Decorah, the average length of the day in April is 13h and 27min.On the first day of April, sunrise is at 6:47 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 8:08 pm CDT.
Sunshine
In April, the average sunshine is 7.4h.UV index
In April, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In April, the maximum UV index of 3 translates into these guidelines:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Decorah in April?
What is the average humidity in April in Decorah?
How much does it rain in Decorah in April?
How many days does it snow in April in Decorah?
How many hours of daylight does Decorah have in April?
What time are sunrise and sunset in April in Decorah?
How many hours of sunshine does Decorah have in April?
What is the UV index intensity in April in Decorah?
Average temperature in April
Decorah, IA
- Average high temperature in April: 54°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.3°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 (9.7°F).
Average pressure in April
Decorah, IA
- Average pressure in April: 29.94"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Decorah, IA
- Average wind speed in April: 10.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in April
Decorah, IA
- Average humidity in April: 77%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).
Average rainfall in April
Decorah, IA
- Average rainfall in April: 3.39"
The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in April
Decorah, IA
- Average rainfall days in April: 16.5 days
The months with the highest number of rainy days are May and June (20.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in April
Decorah, IA
- Average snowfall in April: 2.44"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Decorah, IA
- Average snowfall days in April: 3.8 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Decorah, 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 2min
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 30min).
Average sunshine days in April
Decorah, IA
- Average sunshine days in April: 10.3 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.1 days).
Average UV index in April
Decorah, IA
- Average UV index in April: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in April
Decorah, 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
Decorah, IA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Decorah, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location