Bissau
Guinea-Bissau
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 33 | 38 | 35 | 37 | 38 | 40 | 41 | 41 | 42 | 38 | 42 | 42 | 42 |
| Average high, °C | 30 | 32 | 33 | 31 | 32 | 35 | 37 | 38 | 37 | 33 | 30 | 29 | 33 |
| Average temperature, °C | 27 | 27 | 27 | 24 | 25 | 27 | 29 | 31 | 31 | 29 | 27 | 27 | 28 |
| Average low, °C | 22 | 22 | 20 | 16 | 16 | 19 | 21 | 23 | 24 | 23 | 22 | 22 | 21 |
| Record low, °C | 20 | 18 | 16 | 10 | 13 | 16 | 18 | 18 | 20 | 21 | 22 | 21 | 10 |
| Rain, days | 7 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 4 | 6 | 8 | 31 |
| Fog, days | 3 | 5 | 9 | 10 | 4 | 6 | 7 | 8 | 6 | 3 | 2 | 4 | 67 |
| Thunderstorms, days | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 2 | 13 |
| Average precipitation, mm. | 343 | 184 | 24 | 2 | 0 | 0 | 0 | 3 | 39 | 156 | 277 | 398 | 1426 |
| Relative humidity, % | 85 | 77 | 63 | 48 | 40 | 41 | 39 | 42 | 53 | 67 | 77 | 82 | 59 |
| Relative humidity morning, % | 97 | 96 | 94 | 83 | 71 | 68 | 65 | 71 | 75 | 84 | 93 | 96 | 83 |
| Relative humidity evening, % | 78 | 63 | 44 | 33 | 23 | 23 | 23 | 24 | 36 | 67 | 76 | 74 | 47 |
| Wind speed, km/h | 8 | 7 | 5 | 8 | 8 | 10 | 9 | 10 | 13 | 10 | 10 | 9 | 9 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 24 | 23 | 19 | 13 | 11 | 13 | 14 | 16 | 20 | 22 | 23 | 24 | 220 |
| Growing degree-day, °C | 501 | 539 | 498 | 446 | 471 | 480 | 595 | 618 | 651 | 564 | 527 | 527 | 6419 |
| Solar radiation, global, Mj/m2 | 18 | 19 | 19 | 19 | 19 | 21 | 24 | 25 | 24 | 20 | 19 | 18 | 20 |