Charleston May Weather

Averages and records for weather in Charleston, South Carolina in the month of May.
Typical Charleston May Weather
1991–2020
Average daily high 83.7 °F
Average daily low 63.2 °F
Average monthly precipitation 3.3 inches
Average monthly snow none
Daily chance of precipitation 26.1%
Daily chance of snow 0%
Charleston May Weather Records
1893–2024
Highest temperature 101 °F May 29, 2019
Lowest temperature 36 °F May 2, 1963
Highest daily low 79 °F May 30, 2019
Lowest daily high 53 °F May 7, 1992
Hottest average high temperature 88.6 °F 2019
Coldest average high temperature 75.2 °F 1920
Most daily precipitation 6.2 inches May 22, 1967
Most monthly precipitation 10.6 inches 2018
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
May 1 80.5 58.8 93 43
May 2 80.6 59.1 95 36
May 3 80.8 59.5 94 40
May 4 81.1 59.8 94 38
May 5 81.2 60.0 95 37
May 6 81.4 60.2 95 43
May 7 81.5 60.5 93 45
May 8 81.7 60.8 93 45
May 9 82.0 61.1 95 45
May 10 82.2 61.3 93 42
May 11 82.5 61.6 96 42
May 12 82.7 61.9 96 41
May 13 83.0 62.2 95 44
May 14 83.2 62.6 95 42
May 15 83.5 62.9 97 47
May 16 83.7 63.2 96 47
May 17 83.9 63.5 96 49
May 18 84.1 63.8 98 50
May 19 84.3 64.0 96 43
May 20 84.5 64.3 97 45
May 21 84.7 64.7 99 45
May 22 85.0 65.0 98 48
May 23 85.0 65.3 97 47
May 24 85.1 65.5 97 50
May 25 85.2 65.7 97 47
May 26 85.3 65.9 100 50
May 27 85.5 66.1 100 52
May 28 85.7 66.4 101 45
May 29 86.0 66.8 101 53
May 30 86.2 67.1 99 55
May 31 86.4 67.4 98 49
Weather Station Details
Years Station Coordinates
1938–2024 Charleston International Airport location
1893–1937 Charleston location