Sullivans Island, South Carolina Climate
United States
Pop. 1,791 Elev. 7 m / 23 ft
TZ: America/New_York (UTC-4) ·
Sullivans Island has warm summers with average highs of 85°F (29°C) in July, and cool winters averaging 41°F (5°C) in January. Humidity pushes the summer feels-like temperature to around 98°F (37°C). Rain falls on about 72 days per year (50.1 in / 1272 mm total), with snow on 1 days and 7 in (170 mm) of annual accumulation. The city averages 156 sunny days per year and around 51 thunderstorm days. Ocean water temperatures reach 86°F (30°C) in summer.
| Temperature | 85°F (29°C) high | 41°F (5°C) low |
| Feels like | 98°F (37°C) high | 37°F (3°C) low |
| Rain | 72 days | 50.1 in (1272 mm) /yr |
| Snow | 1 days | 6.7 in (170 mm) /yr |
| Sky | 156 sunny | 51 stormy |
| Wind | 4.9 mph (2.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Apr, May, Jun, Jul, Sep, Nov
Sky & Air by Month
Cloud cover (%)
38
Jan 48
Feb 39
Mar 42
Apr 63
May 52
Jun 61
Jul 70
Aug 46
Sep 49
Oct 31
Nov 46
Dec Humidity (%)
65
Jan 78
Feb 71
Mar 75
Apr 79
May 83
Jun 83
Jul 80
Aug 79
Sep 75
Oct 73
Nov 76
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 15 mi Charleston International Airport (CHS)
Ski resort 258 mi Appalachian Mountain Ski Area
National park 1 mi Fort Sumter and Fort Moultrie National Historical Park
Mountain peak
(5,053 ft) 246 mi Green Knob
Hospital 4 mi Vibra Hospital Of Charleston
Hiking trail 24 mi Palmetto Trail: Awendaw Passage
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 51°F 11°C | 41°F 5°C | 2.1 in 53 mm | 6.7 in170 mm | 18 |
| February | 60°F 15°C | 50°F 10°C | 1.7 in 44 mm | — | 12 |
| March | 64°F 18°C | 56°F 13°C | 5.4 in 137 mm | — | 16 |
| April | 71°F 22°C | 65°F 19°C | 0.8 in 21 mm | — | 15 |
| May | 78°F 26°C | 72°F 22°C | 4.5 in 115 mm | — | 7 |
| June | 82°F 28°C | 77°F 25°C | 4.4 in 112 mm | — | 12 |
| July | 85°F 29°C | 80°F 27°C | 5.1 in 130 mm | — | 8 |
| August | 83°F 28°C | 77°F 25°C | 11.1 in 283 mm | — | 6 |
| September | 80°F 26°C | 73°F 23°C | 3.1 in 79 mm | — | 14 |
| October | 72°F 22°C | 65°F 18°C | 8.6 in 218 mm | — | 14 |
| November | 66°F 19°C | 57°F 14°C | 0.5 in 14 mm | — | 20 |
| December | 59°F 15°C | 50°F 10°C | 2.6 in 67 mm | — | 14 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 18 | 0 |
| February | 12 | 1 |
| March | 16 | 6 |
| April | 15 | 0 |
| May | 7 | 5 |
| June | 12 | 8 |
| July | 8 | 9 |
| August | 6 | 11 |
| September | 14 | 3 |
| October | 14 | 5 |
| November | 20 | 1 |
| December | 14 | 2 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 57°F 14°C | 50°F 10°C |
| February | 56°F 13°C | 54°F 12°C |
| March | 64°F 18°C | 59°F 15°C |
| April | 72°F 22°C | 69°F 20°C |
| May | 77°F 25°C | 75°F 24°C |
| June | 83°F 28°C | 80°F 27°C |
| July | 86°F 30°C | 84°F 29°C |
| August | 86°F 30°C | 83°F 28°C |
| September | 81°F 27°C | 79°F 26°C |
| October | 78°F 25°C | 71°F 22°C |
| November | 66°F 19°C | 63°F 17°C |
| December | 61°F 16°C | 56°F 13°C |