April weather forecastSullivan's Island, SC
April
Weather in April
April in Sullivan's Island, South Carolina, is an agreeable spring month, with temperature in the range of an average high of 71.8°F (22.1°C) and an average low of 61.3°F (16.3°C).Temperature
Sullivan's Island in April experiences a slight uptick in the average high-temperature, adjusting from March's enjoyable 64.4°F (18°C) to an agreeable 71.8°F (22.1°C). Sullivan's Island experiences a nighttime temperature average of 61.3°F (16.3°C) during April.Humidity
In Sullivan's Island, the average relative humidity in April is 75%.Rainfall
In April, the rain falls for 13.1 days. Throughout April, 3.07" (78mm) of precipitation is accumulated. In Sullivan's Island, during the entire year, the rain falls for 182 days and collects up to 45.55" (1157mm) of precipitation.Snowfall
In Sullivan's Island, snow does not fall in March through December.Daylight
In April, the average length of the day is 13h and 1min.On the first day of April, sunrise is at 7:06 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 8:00 pm EDT.
Sunshine
The average sunshine in April is 9.9h.UV index
In April, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 6 in April, converts into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Sullivan's Island, SC
- Average high temperature in April: 71.8°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in April: 61.3°F
The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure in April
Sullivan's Island, SC
- Average pressure in April: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in April
Sullivan's Island, SC
- Average wind speed in April: 10.3mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity in April
Sullivan's Island, SC
- Average humidity in April: 75%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).
Average rainfall in April
Sullivan's Island, SC
- Average rainfall in April: 3.07"
The wettest month (with the highest rainfall) is August (8.23").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in April
Sullivan's Island, SC
- Average rainfall days in April: 13.1 days
The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (8.5 days).
Average snowfall days in April
Sullivan's Island, SC
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in April /
Average sunshine in April
Sullivan's Island, SC
- Average daylight in April: 13h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in April: 9h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in April
Sullivan's Island, SC
- Average sunshine days in April: 15.8 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (2.8 days).
Average UV index in April
Sullivan's Island, SC
- Average UV index in April: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in April
Sullivan's Island, SC
- Average cloud cover in April: 28
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in April
Sullivan's Island, SC
- 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).
