Green Castle Hill
- Annual mean
- 27 °C
- Warmest month
- September
- Wettest month
- October
Long-term atmospheric averages for a representative point in Antigua and Barbuda
Twelve-month climate patterns for Fort Barrington derived from NASA POWER measurements between 1991 and 2020. This record provides consistent averages for temperature, daily precipitation, relative humidity, wind speed, and daylight hours. These data points reflect stationary climatology at a specific elevation, offering a precise look at annual atmospheric trends rather than transient weather or seasonal forecasts.
Long term monthly thermal range and average daily precipitation cycles across the calendar year
Long-term climate normals spanning average daily precipitation, wind speed, relative humidity, and calculated daylight hours across the calendar year
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | 25.8 °C24.3° to 27° | 1.4 mm/day | 75.6% | 7.3 m/s | 11.1 hours |
| February | 25.5 °C24.1° to 26.8° | 1.2 mm/day | 74.9% | 7.2 m/s | 11.4 hours |
| March | 25.6 °C24.1° to 27° | 1.1 mm/day | 75% | 6.6 m/s | 11.9 hours |
| April | 26.3 °C24.7° to 27.8° | 1.6 mm/day | 76.1% | 6.5 m/s | 12.4 hours |
| May | 27 °C25.6° to 28.4° | 2.9 mm/day | 78.2% | 6.6 m/s | 12.8 hours |
| June | 27.7 °C26.5° to 28.7° | 2.9 mm/day | 78.2% | 7.3 m/s | 13 hours |
| July | 27.9 °C26.7° to 28.9° | 3.4 mm/day | 78.4% | 7.6 m/s | 12.9 hours |
| August | 28.2 °C27° to 29.3° | 3.9 mm/day | 78.7% | 6.8 m/s | 12.6 hours |
| September | 28.3 °C27° to 29.5° | 5 mm/day | 79% | 5.8 m/s | 12.1 hours |
| October | 28 °C26.6° to 29.2° | 5.1 mm/day | 79% | 5.6 m/s | 11.6 hours |
| November | 27.3 °C25.8° to 28.6° | 4.4 mm/day | 78.3% | 6.2 m/s | 11.2 hours |
| December | 26.5 °C25.1° to 27.7° | 2.4 mm/day | 76.5% | 7 m/s | 11 hours |
Warmest, coolest, wettest, and windiest periods derived from long-term monthly normals
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, humidity, and wind patterns across diverse protected landscapes


Explore the coastal terrain and historic defensive fortifications of Fort Barrington through the MoriAtlas dataset. Our mapping offers a clear look at this significant site in Antigua and Barbuda, providing essential context for its hilltop position and its lasting impact on the regional maritime landscape.