Roseau
Dominica
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 33 | 32 | 32 | 31 | 30 | 31 | 31 | 32 | 33 | 35 | 32 | 36 | 36 |
| Average high, °C | 30 | 30 | 29 | 28 | 27 | 28 | 28 | 28 | 30 | 30 | 30 | 30 | 29 |
| Average temperature, °C | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 25 | 26 | 26 | 26 | 26 | 25 |
| Average low, °C | 23 | 23 | 23 | 22 | 21 | 21 | 22 | 22 | 23 | 25 | 25 | 24 | 23 |
| Record low, °C | 19 | 18 | 17 | 16 | 15 | 16 | 17 | 17 | 17 | 22 | 21 | 21 | 15 |
| Rain, days | 24 | 22 | 22 | 22 | 23 | 19 | 21 | 18 | 21 | 22 | 25 | 25 | 264 |
| Fog, days | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 10 |
| Thunderstorms, days | 6 | 5 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 4 | 24 |
| Average precipitation, mm. | 240 | 216 | 225 | 138 | 106 | 70 | 67 | 80 | 147 | 181 | 232 | 233 | 1935 |
| Relative humidity, % | 85 | 85 | 85 | 85 | 80 | 80 | 80 | 80 | 80 | 80 | 85 | 85 | 83 |
| Relative humidity morning, % | 94 | 95 | 93 | 90 | 89 | 88 | 88 | 90 | 90 | 88 | 89 | 91 | 90 |
| Relative humidity evening, % | 79 | 80 | 81 | 78 | 75 | 73 | 72 | 72 | 75 | 76 | 77 | 78 | 76 |
| Wind speed, km/h | 14 | 12 | 12 | 14 | 16 | 16 | 16 | 16 | 16 | 17 | 16 | 16 | 15 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 |
| Dew point, °C | 23 | 23 | 23 | 21 | 21 | 20 | 21 | 21 | 22 | 23 | 23 | 23 | 264 |
| Growing degree-day, °C | 467 | 482 | 450 | 465 | 431 | 392 | 431 | 450 | 482 | 467 | 482 | 482 | 5481 |
| Solar radiation, global, Mj/m2 | 22 | 20 | 18 | 17 | 19 | 21 | 23 | 25 | 24 | 23 | 23 | 24 | 22 |