June 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 June in Charleston?

In June, in Charleston, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 69.6°F (20.9°C).

How much does it rain in Charleston in June?

In June, the rain falls for 11.9 days. Throughout June, 5.6" (143.5mm) of precipitation is accumulated.
Average temperature in June - Charleston, SC
  • Average high temperature in June: 31.3°C

The warmest month (with the highest average high temperature) is July (32.8°C).
The month with the lowest average high temperature is January (15°C).

  • Average low temperature in June: 20.9°C

The month with the highest average low temperature is July (22.8°C).
The coldest month (with the lowest average low temperature) is January (3.1°C).

Average humidity in June - Charleston, SC
  • Average humidity in June: 75.1%

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 June - Charleston, SC
  • Average rainfall in June: 143.5mm

The wettest month (with the highest rainfall) is August (181.6mm).
The driest month (with the lowest rainfall) is November (61.7mm).

Average rainfall days in June - Charleston, SC
  • Average rainfall days in June: 11.9 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 June - Charleston, SC
  • Average snowfall in June: 0mm

The month with the highest snowfall is December (12.7mm).
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0mm).

Average snowfall days in June - Charleston, SC
  • Average snowfall days in June: 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 June - Charleston, SC
  • Average sea temperature in June: 26.3°C

The best month for swimming (with the highest average sea temperature) is August (28.6°C).
The coldest month (with the lowest average sea temperature) is February (16.7°C).

Average daylight in June / Average sunshine in June - Charleston, SC
  • Average daylight in June: 14.3h

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 June: 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 June - Charleston, SC
  • Average UV index in June: 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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