Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Seabrook Island features a humid subtropical climate (Cfa). Temperatures typically range between 12 °C (53 °F) and 27 °C (82 °F) through the year, but rarely can drop to -3 °C (28 °F) or can rise to as high as 32 °C (89 °F). The average annual precipitation amounts to about 1379 mm (54.3 inches) and receives 134 rainy days on the 1 mm (0.04 inches) threshold annually. Seabrook Island enjoys an average of 3418 hours of sunshine throughout the year, and daylight varies from 10 hours 2 minutes to 14 hours 14 minutes per day.
The warmest months in Seabrook Island are July, August and September, with daily mean temperatures ranging from 26 to 27 °C (79 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 13 °C (53 - 56 °F) throughout the day. On average each year, Seabrook Island experiences 122 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 21°C (69°F) |
20°C (69°F) |
23°C (74°F) |
27°C (81°F) |
30°C (87°F) |
31°C (88°F) |
31°C (89°F) |
31°C (89°F) |
32°C (89°F) |
29°C (85°F) |
26°C (79°F) |
21°C (70°F) |
| Mean maximum | 19°C (66°F) |
19°C (67°F) |
21°C (71°F) |
24°C (76°F) |
27°C (82°F) |
29°C (85°F) |
31°C (87°F) |
31°C (88°F) |
30°C (87°F) |
28°C (82°F) |
24°C (75°F) |
20°C (68°F) |
| Average high | 14°C (57°F) |
15°C (60°F) |
17°C (64°F) |
21°C (69°F) |
24°C (76°F) |
27°C (81°F) |
29°C (84°F) |
29°C (84°F) |
27°C (82°F) |
25°C (77°F) |
19°C (66°F) |
15°C (60°F) |
| Daily mean | 12°C (53°F) |
13°C (56°F) |
15°C (60°F) |
19°C (66°F) |
23°C (74°F) |
26°C (79°F) |
27°C (82°F) |
27°C (82°F) |
26°C (79°F) |
23°C (74°F) |
16°C (62°F) |
13°C (56°F) |
| Average low | 9°C (49°F) |
11°C (53°F) |
13°C (56°F) |
17°C (63°F) |
22°C (71°F) |
25°C (77°F) |
26°C (79°F) |
26°C (79°F) |
25°C (77°F) |
21°C (70°F) |
14°C (57°F) |
11°C (52°F) |
| Mean minimum | 1°C (34°F) |
4°C (40°F) |
5°C (41°F) |
9°C (49°F) |
15°C (59°F) |
21°C (70°F) |
24°C (75°F) |
24°C (75°F) |
21°C (69°F) |
14°C (57°F) |
7°C (45°F) |
4°C (40°F) |
| Minimum | -3°C (28°F) |
2°C (36°F) |
3°C (37°F) |
6°C (44°F) |
13°C (55°F) |
18°C (65°F) |
23°C (74°F) |
23°C (73°F) |
17°C (62°F) |
8°C (47°F) |
3°C (38°F) |
1°C (33°F) |
Compare temperature, precipitation, sunshine, UV index in Seabrook Island, South Carolina, United States with other places around the world.
Seabrook Island usually has the most precipitation in July, August and September, with an average of 16 rainy days and 177 mm (7.0 inches) of precipitation per month. The driest months in Seabrook Island are January, March and May. On average, 73 mm (2.9 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 66 (2.6) | 87 (3.4) | 72 (2.8) | 94 (3.7) | 81 (3.2) | 117 (4.6) | 162 (6.4) | 200 (7.9) | 170 (6.7) | 90 (3.5) | 97 (3.8) | 145 (5.7) |
| Average precipitation days (≥ 1 mm) | 7 | 10 | 7 | 7 | 8 | 15 | 17 | 20 | 13 | 10 | 9 | 11 |
The sunniest months in Seabrook Island are May, June and July, when the sun shines an average of 11 hours 1 minutes a day. Least sunny months in Seabrook Island: January, February and December receive an average of 6 hours 58 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 194 | 218 | 285 | 312 | 341 | 325 | 346 | 319 | 304 | 294 | 252 | 221 |
| Mean daily daylight hours | 10h 16m | 11h 1m | 12h 0m | 13h 0m | 13h 50m | 14h 14m | 14h 1m | 13h 16m | 12h 19m | 11h 19m | 10h 28m | 10h 2m |
Seabrook Island experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Seabrook Island UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 4 | 7 | 9 | 10 | 11 | 11 | 11 | 11 | 10 | 8 | 6 | 4 |
Discover in-depth weather details for every month in Seabrook Island. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Seabrook Island's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.