April weather forecast
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina
Trees along both sides of a street in Charleston, South Carolina

Weather in April

April is an agreeable spring month in Charleston, South Carolina, with an average temperature varying between 72.7°F (22.6°C) and 60.4°F (15.8°C).

Temperature

In April, the average high-temperature marginally rises from an enjoyable 65.1°F (18.4°C) in March to a pleasant 72.7°F (22.6°C). The average low-temperature, in Charleston, is 60.4°F (15.8°C).

Humidity

The average relative humidity in April is 74%.

Rainfall

In Charleston, it is raining for 12.8 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, in Charleston, there are 178.9 rainfall days, and 41.93" (1065mm) of precipitation is accumulated.

Snowfall

February through November are months without snowfall.

Ocean temperature

In Charleston, the average seawater temperature in April is 67.5°F (19.7°C).
Note: For most, swimming in 67.5°F (19.7°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In April, the average length of the day is 13h and 1min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:39 pm. On the last day of April, in Charleston, sunrise is at 6:33 am and sunset at 8:00 pm EDT.

Sunshine

In April, the average sunshine is 9.8h.

UV index

In April, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 6 in April transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in April in Charleston?

In April, the average relative humidity in Charleston is 74%.

How many days does it rain in April in Charleston?

In Charleston, in April, it is raining for 12.8 days, with typically 2.83" (72mm) of accumulated precipitation.

When it does not snow in Charleston?

In Charleston, snow does not fall in February through November.

What is the ocean temperature in April in Charleston?

In April, the average ocean temperature is 67.5°F (19.7°C). Swimming in 67.5°F (19.7°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the average length of the day in April in Charleston?

In Charleston, South Carolina, the average day length in April is 13h and 1min.

When is the sunrise / sunset in April in Charleston?

In April, on the first day of the month, sunrise is at 7:07 am and sunset at 7:39 pm. On the last day of the month, in Charleston, South Carolina, sunrise is at 6:33 am and sunset at 8:00 pm EDT.

How long on average sun shines in April in Charleston?

In Charleston, South Carolina, the average sunshine duration in April is 9.8h.

What is the UV index intensity in April in Charleston?

In April, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Charleston, SC

Average temperature in April - Charleston, SC
  • Average high temperature in April: 72.7°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (57°F).

  • Average low temperature in April: 60.4°F

The month with the highest average low temperature is July (77.4°F).
The coldest month (with the lowest average low temperature) is January (44.4°F).

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Average pressure in April
Charleston, SC

Average pressure in April - Charleston, 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).

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Average wind speed in April
Charleston, SC

Average wind speed in April - Charleston, SC
  • Average wind speed in April: 9.4mph

The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).

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Average humidity in April
Charleston, SC

Average humidity in April - Charleston, SC
  • Average humidity in April: 74%

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).

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Average rainfall in April
Charleston, SC

Average rainfall in April - Charleston, SC
  • Average rainfall in April: 2.83"

The wettest month (with the highest rainfall) is August (7.13").
The driest month (with the least rainfall) is January (1.42").

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Average rainfall days in April
Charleston, SC

Average rainfall days in April - Charleston, SC
  • Average rainfall days in April: 12.8 days

The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is November (8.7 days).

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Average snowfall in April
Charleston, SC

Average snowfall in April - Charleston, SC
  • Average snowfall in April: 0"

The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in April
Charleston, SC

Average snowfall days in April - Charleston, SC
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in April
Charleston, SC

Average sea temperature in April - Charleston, SC
  • Average sea temperature in April: 67.4°F

The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).

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Average daylight in April /
Average sunshine in April
Charleston, SC

Average daylight in April / Average sunshine in April - Charleston, SC
  • Average daylight in April: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 17min).
The month with the shortest days is December (Average daylight: 10h and 2min).

  • Average sunshine in April: 9h and 48min

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).

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Average sunshine days in April
Charleston, SC

Average sunshine days in April - Charleston, 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 (3.8 days).

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Average UV index in April
Charleston, SC

Average UV index in April - Charleston, 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).

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Average cloud cover in April
Charleston, SC

Average cloud cover in April - Charleston, SC
  • Average cloud cover in April: 28

The months with the most cloud cover are February and December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 26).

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Average visibility in April
Charleston, SC

Average visibility in April - Charleston, 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).

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