Gray's Reef National Marine Sanctuary
- Annual mean
- 21.4 °C
- Warmest month
- August
- Wettest month
- August
Examine twelve-month average temperature, precipitation, and daylight patterns from 1991 to 2020.
The climate profile for the Ashepoo Combahee Edisto Basin National Estuarine Research Reserve provides a structured overview of atmospheric measurements based on NASA POWER records. Each monthly entry captures representative averages for air temperature, precipitation rates, relative humidity, wind speed, and daylight hours recorded at a fixed point. These long-term averages serve as a baseline for understanding regional atmospheric trends over the specified three-decade period.

Long-term monthly averages tracking temperature progression and daily precipitation rates across the calendar year
Twelve Month Climatology Tracking Temperature, Precipitation, Humidity, Wind, and Daylight
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | 10.3 °C-2.2° to 21.2° | 2.9 mm/day | 80.1% | 5.3 m/s | 10.1 hours |
| February | 11.9 °C-0.2° to 22.1° | 2.8 mm/day | 79.6% | 5.3 m/s | 10.8 hours |
| March | 15.1 °C2.4° to 24.6° | 2.9 mm/day | 77.4% | 5.5 m/s | 11.8 hours |
| April | 19.2 °C7.8° to 27.6° | 2.7 mm/day | 74.4% | 5.4 m/s | 12.8 hours |
| May | 23.6 °C13.3° to 31.7° | 2.6 mm/day | 72.2% | 5.1 m/s | 13.7 hours |
| June | 26.8 °C20.2° to 34° | 4.8 mm/day | 74.2% | 4.6 m/s | 14.1 hours |
| July | 28.4 °C23.2° to 34.8° | 4.6 mm/day | 74.2% | 4.4 m/s | 13.9 hours |
| August | 27.9 °C22.1° to 34.1° | 5 mm/day | 75.5% | 4.2 m/s | 13.2 hours |
| September | 25.6 °C16.9° to 32.1° | 3.8 mm/day | 75.9% | 4.8 m/s | 12.2 hours |
| October | 21 °C9° to 29.2° | 3.1 mm/day | 75.1% | 4.8 m/s | 11.2 hours |
| November | 15.5 °C3.6° to 25.3° | 2.1 mm/day | 76.8% | 5 m/s | 10.3 hours |
| December | 11.9 °C0.6° to 22.4° | 2.6 mm/day | 80.6% | 5 m/s | 9.9 hours |
Warmest, coolest, wettest, and windiest calendar months derived from long-term regional climatology records
Interactive climate map
Visit the MoriAtlas climate map to compare long-term monthly temperature and precipitation metrics across national parks. This visual interface helps you understand seasonal variations at specific protected area coordinates to deepen your knowledge of global park geography and environmental characteristics.
Explore monthly temperature, precipitation, and atmospheric patterns across diverse protected areas.





Trace the tidal creeks and river corridors of this essential South Carolina protected area. MoriAtlas provides a clear view of the basin's ecological boundaries, allowing for a deeper understanding of the landscape scale and the convergence of the Ashepoo, Combahee, and Edisto rivers into the Atlantic.