National Weather Service United States Department of Commerce
July Daily/Monthly Normals for Charleston
(see notes below table)
Date Normal High Normal Low Average Record High RH Year Record Low RL Year HDD CDD Precip
1
85
65
75
105
1931
47
1988
0
10
.14
2
85
65
75
105
1931
46
1937
0
10
.14
3
85
65
75
108
1931
48
1937
0
10
.14
4
85
65
75
99
1903
50
1968*
0
10
.15
5
85
65
75
100
1934
47
1968
0
10
.15
6
85
65
75
97
2010
47
1979
0
10
.15
7
86
66
76
100
1988
47
1983
0
10
.15
8
86
66
76
102
1988
47
1972
0
11
.16
9
86
66
76
102
1929
48
1963
0
11
.16
10
86
66
76
102
1936
46
1963
0
11
.15
11
86
66
76
101
1936
50
1963*
0
11
.16
12
85
66
76
103
1929
49
1945
0
11
.17
13
85
66
76
101
1931
53
1973
0
11
.16
14
85
66
76
102
1954*
53
1903
0
11
.17
15
85
66
76
103
1988
52
1987*
0
11
.17
16
85
66
76
104
1988
51
1945
0
11
.17
17
85
66
76
100
1988
52
1954
0
11
.18
18
85
66
76
100
1930
51
1976
0
11
.17
19
85
66
76
103
1930
51
1937
0
11
.16
20
85
66
76
106
1930
53
1947
0
11
.16
21
85
66
76
105
1934
50
1970
0
11
.17
22
85
66
76
106
1934
49
1947
0
11
.17
23
85
66
76
99
1933*
49
1947
0
10
.16
24
85
66
76
104
1934
50
1947
0
10
.16
25
85
66
75
106
1934
51
1947
0
10
.16
26
85
66
75
104
1934
52
1920
0
10
.16
27
85
66
75
100
1936
50
1962
0
10
.17
28
85
66
75
106
1930
46
1937
0
10
.16
29
85
66
75
103
1930
50
1925
0
10
.15
30
85
66
75
100
1931
53
1965
0
10
.16
31
85
66
75
101
1931
52
1956*
0
10
.16
Totals
85.2
65.7
75.4
108
1931
46
1963*
0
324
4.94

NOTES:

  • Temperatures are degrees F, precipitation is inches of liquid. All normals are based on the period 1981-2010.
  • RH Year=Year of record high, RH Low=Year of record low. Temperature records for Charleston began in 1901.
  • HDD=Heating degree days, CDD=Cooling degree days
  • An asterisk (*) after the year of occurrence of record highs and lows indicates the record was reached more than once, with the indicated year being the most recent.
  • Daily normal precipitation values are more appropriate for calculating normals over a period of at least several days, rather than on a strict day-to-day basis.
  • Averages/totals may differ slightly from expected due to rounding.

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