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 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 onset of April marks a slight increase in the average high-temperature, moving from an enjoyable 64.4°F (18°C) in March to a pleasant 71.8°F (22.1°C). During April, the nighttime temperature averages of 61.3°F (16.3°C).Humidity
The average relative humidity in April in Sullivan's Island is 75%.Rainfall
In Sullivan's Island, South Carolina, in April, it is raining for 13.1 days, with typically 3.07" (78mm) of accumulated precipitation. Throughout the year, there are 182 rainfall days, and 45.55" (1157mm) of precipitation is accumulated.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 in Sullivan's Island, 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
In April, the average sunshine is 9.9h.UV index
In April, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: In April, a regular UV index of 6 translates into these guidelines:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
What are April temperatures in Sullivan's Island?
What is the average humidity in April in Sullivan's Island?
How much does it rain in Sullivan's Island in April?
When it does not snow in Sullivan's Island?
What is the average length of the day in April in Sullivan's Island?
When is the sunrise / sunset in April in Sullivan's Island?
How many hours of sunshine does Sullivan's Island have in April?
What is the UV index intensity in April in Sullivan's Island?
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 5min
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).
Sullivan's Island, South Carolina, USA
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