April weather forecastSumner, IA
April
Weather in April
April is a cool spring month in Sumner, Iowa, with an average temperature ranging between min 39°F (3.9°C) and max 55°F (12.8°C).Temperature
As April arrives, Sumner's weather shows an increase in high-temperatures, moving from March's cold 42.4°F (5.8°C) to a fresh 55°F (12.8°C). An average low-temperature of 39°F (3.9°C) is observed during the April nights.Humidity
The average relative humidity in April is 74%.Rainfall
In Sumner, in April, it is raining for 16.1 days, with typically 3.43" (87mm) of accumulated precipitation. In Sumner, during the entire year, the rain falls for 146.8 days and collects up to 30.79" (782mm) of precipitation.Snowfall
Months with snowfall in Sumner, Iowa, are January through May, October through December. In April, it is snowing for 3 days. Throughout April, 1.77" (45mm) of snow is accumulated. Throughout the year, there are 55.9 snowfall days, and 23.46" (596mm) of snow is accumulated.Daylight
In Sumner, the average length of the day in April is 13h and 25min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:35 pm. On the last day of April, in Sumner, sunrise is at 6:02 am and sunset at 8:08 pm CDT.
Sunshine
In Sumner, the average sunshine in April is 7.4h.UV index
In Sumner, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 3 during April morphs into the following directions:
Take precautions - Protection against skin and eye damage is obliged. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Sumner, IA
- Average high temperature in April: 55°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in April: 39°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (11.1°F).
Average pressure in April
Sumner, IA
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Sumner, IA
- Average wind speed in April: 10.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in April
Sumner, IA
- Average humidity in April: 74%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (73%).
Average rainfall in April
Sumner, IA
- Average rainfall in April: 3.43"
The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in April
Sumner, IA
- Average rainfall days in April: 16.1 days
The month with the highest number of rainy days is May (20.3 days).
The months with the least rainy days are January and February (4.3 days).
Average snowfall in April
Sumner, IA
- Average snowfall in April: 1.77"
The month with the highest snowfall is February (5.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Sumner, IA
- Average snowfall days in April: 3 days
The month with the highest number of snowfall days is January (13.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Sumner, IA
- Average daylight in April: 13h and 24min
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 6min).
- Average sunshine in April: 7h and 24min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in April
Sumner, IA
- Average sunshine days in April: 10.3 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is June (7.3 days).
Average UV index in April
Sumner, IA
- Average UV index in April: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Sumner, IA
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in April
Sumner, IA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
