| Charleston Airport Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
8.8 |
10.3 |
14.5 |
18.3 |
22.7 |
25.7 |
27.5 |
27.0 |
24.7 |
19.3 |
14.7 |
10.7 |
18.7 |
| Avg. Max Temperature |
14.3 |
16.1 |
20.3 |
24.3 |
28.2 |
30.9 |
32.3 |
31.7 |
29.4 |
25.1 |
20.8 |
16.4 |
24.2 |
| Avg. Min Temperature |
3.2 |
4.4 |
8.6 |
12.2 |
17.2 |
20.6 |
22.6 |
22.3 |
19.9 |
13.5 |
8.4 |
4.8 |
13.2 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
< 0.5 |
1.0 |
4.0 |
11.0 |
17.0 |
14.0 |
5.0 |
< 0.5 |
0.0 |
0.0 |
53.0 |
| Days with Min Temp Below Freezing |
11.0 |
7.0 |
3.0 |
< 0.5 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
< 0.5 |
3.0 |
9.0 |
32.0 |
| | |
| Charleston Airport Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
548 |
414 |
239 |
66.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
74.0 |
233 |
439 |
2013 |
| Cooling Degree Days |
15.0 |
8.0 |
25.0 |
63.0 |
242 |
399 |
512 |
484 |
342 |
130 |
35.0 |
11.0 |
2266 |
| | |
| Charleston Airport Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
3.5 |
3.3 |
4.3 |
2.7 |
4.0 |
6.4 |
6.8 |
7.2 |
4.7 |
2.9 |
2.5 |
3.1 |
51.5 |
| Days with Precipitation 0.01 inch or More |
10.0 |
9.0 |
10.0 |
7.0 |
9.0 |
11.0 |
14.0 |
13.0 |
10.0 |
6.0 |
7.0 |
9.0 |
114 |
| Monthly Snowfall (inches) |
0.1 |
0.2 |
0.1 |
< 0.05 |
0.0 |
< 0.05 |
< 0.05 |
0.0 |
0.0 |
0.0 |
< 0.05 |
0.3 |
0.7 |
| | |
| Other Charleston Airport Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
9.1 |
9.8 |
10.0 |
9.7 |
8.6 |
8.3 |
7.8 |
7.4 |
7.7 |
8.0 |
8.1 |
8.5 |
8.6 |
| Clear Days |
9.0 |
9.0 |
9.0 |
11.0 |
8.0 |
6.0 |
5.0 |
6.0 |
7.0 |
11.0 |
12.0 |
9.0 |
102 |
| Partly Cloudy Days |
6.0 |
6.0 |
8.0 |
8.0 |
11.0 |
11.0 |
12.0 |
13.0 |
10.0 |
8.0 |
7.0 |
7.0 |
109 |
| Cloudy Days |
16.0 |
13.0 |
14.0 |
11.0 |
12.0 |
13.0 |
13.0 |
13.0 |
13.0 |
11.0 |
12.0 |
14.0 |
155 |
| Percent of Possible Sunshine |
56.0 |
59.0 |
66.0 |
72.0 |
68.0 |
66.0 |
67.0 |
64.0 |
61.0 |
63.0 |
59.0 |
56.0 |
63.0 |
| Avg. Relative Humidity |
69.5 |
69.0 |
67.5 |
67.0 |
67.0 |
69.5 |
73.5 |
76.0 |
76.5 |
75.5 |
71.0 |
68.5 |
70.5 |