James Island, SC
Climate overview — based on NOAA 1991-2020 normals from CHARLESTON CITY, SC US.
Year-round temperatures (°F)
Climate summary
James Island has an annual average temperature of 67.2°F with about 44.3 inches of precipitation per year. The warmest month is July (average high 87.5°F), and the coldest is January (average low 43.6°F). August is typically the wettest month (6.11 in) and November the driest (2.30 in).
Best time to visit James Island
Full guide →Climate change signal
All-time records →15 of 366 (4.1%) of James Island's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1890s | 20 | |
| 1900s | 28 | |
| 1910s | 35 | |
| 1920s | 42 | |
| 1930s | 41 | |
| 1940s | 37 | |
| 1950s | 33 | |
| 1960s | 18 | |
| 1970s | 23 | |
| 1980s | 33 | |
| 1990s | 21 | |
| 2000s | 13 | |
| 2010s | 13 | |
| 2020s | 9 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 58.0°F | 43.6°F | 50.8°F | 2.56 in | — | 8 |
| February | 60.3°F | 46.1°F | 53.2°F | 2.56 in | — | 8 |
| March | 65.6°F | 52.0°F | 58.8°F | 3.03 in | — | 8 |
| April | 72.3°F | 59.7°F | 66.0°F | 2.96 in | — | 7 |
| May | 79.0°F | 68.0°F | 73.5°F | 2.58 in | — | 7 |
| June | 84.3°F | 74.2°F | 79.2°F | 4.85 in | — | 11 |
| July | 87.5°F | 77.1°F | 82.3°F | 5.08 in | — | 12 |
| August | 86.4°F | 76.5°F | 81.4°F | 6.11 in | — | 12 |
| September | 82.6°F | 72.5°F | 77.6°F | 5.25 in | — | 9 |
| October | 75.6°F | 63.2°F | 69.4°F | 4.07 in | — | 7 |
| November | 67.1°F | 53.1°F | 60.1°F | 2.30 in | — | 6 |
| December | 60.9°F | 46.8°F | 53.8°F | 2.91 in | — | 9 |
Climate twins of James Island
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).