World Resorts USA Charleston Weather

Charleston weather in May

Weather in Charleston: May

Average day temperature: 79.7°F
Average night temperature: 68.6°F
Sea water temperature: 74.0°F
Number of sunny days: 15 days
Day length: 13.5 - 14.2 hours
Number of rainy days: 5 days
Precipitation totals: 2.7 in.

Air temperature in May, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
14
28
42
56
70
84
98
112
Day temperature   
Night temperature

The highest day temperature during May of 2024 was 86°F. At the same time the lowest night temperature was 61°F. Day and night temperature averages during May were 80.5°F and 69.4°F.

Sea water temperature in Charleston in May, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
64
67
70
73
76
79
82
85

The average sea water temperature in May of 2024 was 75.3°F. The highest and lowest sea temperatures during the month were 79.3°F and 70.2°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
44%
34%
22%

Mostly all days in May are sunny but cloudy days are also possible.

Precipitation total in May, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.1
2.3
3.4
4.5
5.6
6.8
7.9
3.8
1.9
2.2
4.8
6.6
5.4
4.5
3.9
2.9
2.7
1.9
3.8
1.9
2.2
4.8
6.6
5.4
4.5
3.0
3.9
2.9
2.7
1.9

Precipitation total value in Charleston in May is 3.0 in. Other months of the year show relatively similar values.

Wind speed in May, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.6
3.1
4.7
6.3
7.8
9.4
11.0
8.2
8.1
7.9
8.3
7.4
7.7
8.2
9.1
9.0
8.5
8.4
8.2
8.1
7.9
8.3
7.4
7.7
8.2
8.4
9.1
9.0
8.5
8.4

The average wind speed value in May is 8.4 mph It makes May one of the most windy months of the year.

Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.6
3.3
4.9
6.5
8.2
9.8
11.4
13.1
5.6
6.1
7.3
7.2
7.4
7.5
8.3
9.5
6.7
6.0
5.9
5.6
6.1
7.3
7.2
7.4
7.5
8.3
8.9
9.5
6.7
6.0
5.9

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 8.9.

Best time for vacation in Charleston

Sunniest months:
April 16 days
October 15 days
May 15 days
Warmest months:
July 89.3 °F
August 87.8 °F
June 86.0 °F
Warmest sea temp:
August 83.7 °F
July 83.6 °F
September 81.2 °F
Coldest months:
January 55.9 °F
February 60.2 °F
December 60.7 °F
Rainiest months:
August 10 days
July 9 days
June 7 days
Windiest months:
March 9.4 mph
April 9.4 mph
February 9.1 mph

Charleston on a weather map

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Places in USA:
Name
°F
+16°F
+19°F
+73°F
+73°F
+54°F
+57°F
+73°F
+18°F
+63°F
+55°F
+50°F
+68°F
+68°F
+55°F
+9°F
24 Hours Forecast
Charleston
Local time: 01:16
February 19, wednesday
0300
52°F
SW
9 mph
0600
54°F
SW
10 mph
0900
52°F
SW
9 mph
1200
48°F
SE
6 mph
1500
45°F
S
9 mph
1800
43°F
S
12 mph
2100
41°F
S
11 mph
February 20, thursday
0000
37°F
S
10 mph
Units of measurement: °C / °F