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 | 35 | 35 | 33 | 33 | 40 | 36 | 42 | 41 | 40 | 32 | 38 | 37 | 42 |
| Average high, °C | 30 | 31 | 31 | 31 | 31 | 33 | 33 | 33 | 33 | 31 | 29 | 28 | 31 |
| Average temperature, °C | 27 | 27 | 27 | 26 | 26 | 27 | 28 | 28 | 29 | 28 | 27 | 26 | 27 |
| Average low, °C | 23 | 23 | 23 | 20 | 19 | 20 | 21 | 22 | 23 | 23 | 23 | 23 | 22 |
| Record low, °C | 22 | 18 | 15 | 12 | 8 | 10 | 11 | 11 | 17 | 18 | 21 | 22 | 8 |
| Rain, days | 7 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 4 | 11 | 13 | 45 |
| Fog, days | 1 | 1 | 3 | 7 | 5 | 6 | 7 | 2 | 3 | 1 | 1 | 0 | 37 |
| Thunderstorms, days | 4 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 4 | 19 |
| Average precipitation, mm. | 440 | 237 | 47 | 4 | 0 | 1 | 0 | 1 | 52 | 225 | 570 | 681 | 2257 |
| Relative humidity, % | 88 | 79 | 70 | 59 | 53 | 55 | 53 | 55 | 64 | 74 | 78 | 83 | 68 |
| Relative humidity morning, % | 92 | 91 | 86 | 73 | 62 | 71 | 77 | 78 | 83 | 89 | 91 | 93 | 82 |
| Relative humidity evening, % | 76 | 68 | 55 | 40 | 33 | 34 | 39 | 46 | 55 | 69 | 78 | 80 | 56 |
| Wind speed, km/h | 10 | 9 | 8 | 10 | 12 | 12 | 12 | 13 | 14 | 12 | 12 | 12 | 11 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 24 | 23 | 21 | 17 | 16 | 17 | 17 | 18 | 21 | 23 | 23 | 23 | 244 |
| Growing degree-day, °C | 498 | 533 | 513 | 481 | 496 | 472 | 555 | 549 | 577 | 525 | 515 | 505 | 6218 |
| Solar radiation, global, Mj/m2 | 17 | 18 | 19 | 19 | 20 | 22 | 24 | 24 | 23 | 19 | 17 | 16 | 20 |