Saint John's
Antigua and Barbuda
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 32 | 32 | 31 | 32 | 30 | 30 | 32 | 32 | 32 | 32 | 35 | 33 | 35 |
| Average high, °C | 30 | 30 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 30 | 30 | 30 | 29 |
| Average temperature, °C | 28 | 27 | 27 | 26 | 25 | 25 | 25 | 26 | 27 | 28 | 28 | 28 | 27 |
| Average low, °C | 25 | 25 | 25 | 23 | 22 | 22 | 23 | 23 | 25 | 26 | 26 | 26 | 24 |
| Record low, °C | 18 | 17 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 20 | 18 | 20 | 17 |
| Rain, days | 19 | 20 | 19 | 20 | 20 | 17 | 16 | 15 | 18 | 17 | 20 | 20 | 221 |
| Thunderstorms, days | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 2 | 16 |
| Average precipitation, mm. | 90 | 110 | 90 | 50 | 30 | 20 | 30 | 30 | 60 | 70 | 80 | 80 | 740 |
| Relative humidity, % | 80 | 80 | 80 | 80 | 80 | 80 | 75 | 80 | 80 | 80 | 80 | 80 | 80 |
| Relative humidity morning, % | 86 | 87 | 86 | 83 | 83 | 83 | 82 | 85 | 85 | 83 | 83 | 84 | 84 |
| Relative humidity evening, % | 76 | 77 | 78 | 76 | 74 | 73 | 72 | 73 | 75 | 74 | 74 | 75 | 75 |
| Wind speed, km/h | 20 | 20 | 22 | 25 | 27 | 25 | 25 | 25 | 25 | 27 | 27 | 25 | 24 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 13 | 13 | 13 |
| Dew point, °C | 23 | 23 | 22 | 21 | 20 | 20 | 20 | 21 | 22 | 23 | 23 | 23 | 261 |
| Growing degree-day, °C | 542 | 543 | 508 | 482 | 465 | 432 | 482 | 483 | 534 | 542 | 568 | 568 | 6149 |
| Solar radiation, global, Mj/m2 | 22 | 20 | 18 | 17 | 19 | 21 | 24 | 25 | 25 | 25 | 25 | 25 | 22 |