July 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 warmest month in Charleston?

With an average high-temperature of 91°F (32.8°C) and an average low-temperature of 73°F (22.8°C), July is the warmest month in Charleston.

What is the temperature in July in Charleston?

The average high-temperature, in July, in Charleston, South Carolina, is 91°F (32.8°C), while the average low-temperature is 73°F (22.8°C).

How many days does it rain in July in Charleston?

In Charleston, during July, the rain falls for 13 days and regularly aggregates up to 6.5" (165.9mm) of precipitation.

What is the water temperature in July in Charleston?

The average seawater temperature, in July, is 82.9°F (28.3°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.
Average temperature in July - Charleston, SC
  • Average high temperature in July: 91.1°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 July: 73°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 July - Charleston, SC
  • Average humidity in July: 76.6%

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 July - Charleston, SC
  • Average rainfall in July: 6.5"

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 July - Charleston, SC
  • Average rainfall days in July: 13 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 July - Charleston, SC
  • Average snowfall in July: 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 July - Charleston, SC
  • Average snowfall days in July: 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 July - Charleston, SC
  • Average sea temperature in July: 83°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 July / Average sunshine in July - Charleston, SC
  • Average daylight in July: 14.1h

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 July: 9.3h

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 July - Charleston, SC
  • Average UV index in July: 10

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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