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 | 25 | 26 | 27 | 28 | 29 | 29 | 28 | 27 | 27 | 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. | 409 | 221 | 39 | 2 | 0 | 1 | 0 | 1 | 49 | 197 | 455 | 570 | 1943 |
| Relative humidity, % | 88 | 78 | 68 | 55 | 49 | 51 | 49 | 51 | 61 | 72 | 77 | 83 | 65 |
| 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 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 5 | 5 | 5 | 5 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 24 | 23 | 20 | 15 | 14 | 16 | 17 | 18 | 21 | 22 | 22 | 23 | 237 |
| Growing degree-day, °C | 498 | 536 | 507 | 468 | 490 | 475 | 570 | 570 | 601 | 537 | 518 | 512 | 6282 |
| Solar radiation, global, Mj/m2 | 18 | 19 | 19 | 19 | 20 | 21 | 24 | 25 | 24 | 20 | 19 | 18 | 20 |