April weather forecastSully, IA
April
Weather in April
April is a moderate spring month in Sully, Iowa, with an average temperature varying between 41.9°F (5.5°C) and 58.8°F (14.9°C).Temperature
The shift into April is characterized by a rise in the average high-temperature, transitioning from March's frosty 46.4°F (8°C) to a refreshing 58.8°F (14.9°C). An average low-temperature of 41.9°F (5.5°C) marks the nights in Sully throughout April.Humidity
In April, the average relative humidity is 73%.Rainfall
In Sully, during April, the rain falls for 11.1 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Sully, during the entire year, the rain falls for 106.7 days and collects up to 11.77" (299mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Sully, Iowa, during April, snow falls for 0.8 days and regularly aggregates up to 0.24" (6mm) of snow. In Sully, during the entire year, snow falls for 28.8 days and aggregates up to 5.28" (134mm) of snow.Daylight
In April, the average length of the day is 13h and 22min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:37 pm. On the last day of April, sunrise is at 6:08 am and sunset at 8:08 pm CDT.
Sunshine
In April, the average sunshine is 8h.UV index
In April, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 3 during April morphs into the following directions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Sully, IA
- Average high temperature in April: 58.8°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in April: 41.9°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in April
Sully, IA
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Sully, IA
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in April
Sully, IA
- Average humidity in April: 73%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in April
Sully, IA
- Average rainfall in April: 1.02"
The wettest month (with the highest rainfall) is May (2.13").
The driest months (with the least rainfall) are January, February and December (0.39").
Average rainfall days in April
Sully, IA
- Average rainfall days in April: 11.1 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in April
Sully, IA
- Average snowfall in April: 0.24"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Sully, IA
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Sully, IA
- Average daylight in April: 13h and 24min
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 12min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in April
Sully, IA
- Average sunshine days in April: 16.5 days
The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in April
Sully, IA
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in April
Sully, IA
- Average cloud cover in April: 45
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in April
Sully, IA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
