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 start of April signals an increase in the average high-temperature, moving from a chilly 47.8°F (8.8°C) in March to a refreshing 60.1°F (15.6°C). Throughout April, Derby's nights cool down to an average of 42.4°F (5.8°C).Humidity
The average relative humidity in April in Derby is 74%.Rainfall
In Derby, in April, it is raining for 14.5 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, in Derby, Iowa, there are 131.1 rainfall days, and 25.71" (653mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Derby. In Derby, in April, during 1.3 snowfall days, 1.38" (35mm) of snow is typically accumulated. In Derby, during the entire year, snow falls for 33.4 days and aggregates up to 13.54" (344mm) of snow.Daylight
In Derby, Iowa, the average length of the day in April is 13h and 20min.On the first day of April, sunrise is at 6:55 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:09 pm CDT.
Sunshine
The average sunshine in April is 8h.UV index
In April, the average daily maximum UV index in Derby is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index, 4 during April, leads to the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Derby in April?
What is the average humidity in April in Derby?
How many days does it rain in April in Derby?
How many days does it snow in April in Derby?
What is the average length of the day in April in Derby?
When are sunrise and sunset in April in Derby?
How long on average sun shines in April in Derby?
How high is the UV index in April in Derby?
Average temperature in April
Derby, IA
- Average high temperature in April: 60.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in April
Derby, 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 (29.89"Hg).
Average wind speed in April
Derby, IA
- Average wind speed in April: 10.5mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in April
Derby, IA
- Average humidity in April: 74%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Derby, IA
- Average rainfall in April: 2.48"
The wettest month (with the highest rainfall) is June (3.74").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in April
Derby, IA
- Average rainfall days in April: 14.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in April
Derby, IA
- Average snowfall in April: 1.38"
The month with the highest snowfall is February (4.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Derby, IA
- Average snowfall days in April: 1.3 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Derby, IA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Derby, IA
- Average sunshine days in April: 13.4 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in April
Derby, IA
- 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 January (UV index 1).
Average cloud cover in April
Derby, IA
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in April
Derby, IA
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
Derby, Iowa, USA
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