April weather forecast and climate
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina, seen in the twilight light
Trees along both sides of a street in Charleston, South Carolina, seen in the twilight light

What is the temperature in April in Charleston?

The average high-temperature, in April, is 76.5°F (24.7°C), while the average low-temperature is 53.2°F (11.8°C).

How much does it rain in Charleston in April?

In April, in Charleston, the rain falls for 7.7 days. Throughout April, 2.9" (73.9mm) of precipitation is accumulated.

What is the sea temperature in April in Charleston?

In April, the average sea 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).
Average temperature in April - Charleston, SC
  • Average high temperature in April: 76.4°F

The warmest month (with the highest average high temperature) is July (91.1°F).
The month with the lowest average high temperature is January (59°F).

  • Average low temperature in April: 53.3°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.5°F).

Average humidity in April - Charleston, SC
  • Average humidity in April: 67.5%

The month with the highest relative humidity is August (78.9%).
The month with the lowest relative humidity is February (67.4%).

Average rainfall in April - Charleston, SC
  • Average rainfall in April: 2.9"

The wettest month (with the highest rainfall) is August (7.2").
The driest month (with the lowest rainfall) is November (2.4").

Average rainfall days in April - Charleston, SC
  • Average rainfall days in April: 7.7 days

The month with the highest number of rainy days is August (13.2 days).
The month with the lowest number of rainy days is November (7 days).

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

The month with the highest snowfall is December (0.5").
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0").

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

Months with the highest number of snowfall days are February and December (0.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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).

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

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in April: 9.2h

The month with most sunshine is May (Average sunshine: 9.5h).
The month with least sunshine is December (Average sunshine: 5.5h).

Average UV index in April - Charleston, SC
  • Average UV index in April: 9

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).

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