Franceville
Gabon
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 32 | 33 | 33 | 35 | 31 | 32 | 32 | 33 | 37 | 32 | 32 | 35 | 37 |
| Average high, °C | 25 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 25 | 24 | 24 | 26 |
| Average temperature, °C | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 28 | 27 | 24 | 23 | 24 | 26 |
| Average low, °C | 22 | 23 | 23 | 24 | 24 | 25 | 25 | 25 | 24 | 22 | 21 | 21 | 23 |
| Record low, °C | 15 | 17 | 21 | 21 | 19 | 21 | 22 | 22 | 16 | 17 | 17 | 17 | 15 |
| Fog, days | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 3 | 3 | 5 | 3 | 17 |
| Thunderstorms, days | 0 | 2 | 8 | 7 | 10 | 14 | 12 | 13 | 7 | 0 | 0 | 0 | 73 |
| Average precipitation, mm. | 38 | 236 | 357 | 209 | 233 | 220 | 238 | 188 | 116 | 8 | 1 | 5 | 1848 |
| Relative humidity, % | 82 | 83 | 85 | 85 | 84 | 83 | 82 | 83 | 84 | 83 | 82 | 82 | 83 |
| Relative humidity morning, % | 94 | 94 | 96 | 96 | 95 | 95 | 95 | 95 | 96 | 94 | 94 | 93 | 95 |
| Relative humidity evening, % | 82 | 83 | 83 | 84 | 80 | 80 | 79 | 81 | 82 | 80 | 78 | 79 | 81 |
| Wind speed, km/h | 8 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 6 | 5 | 6 | 5 |
| Day Length, часов | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 |
| Dew point, °C | 22 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 21 | 20 | 20 | 273 |
| Growing degree-day, °C | 447 | 496 | 486 | 502 | 527 | 480 | 539 | 525 | 518 | 426 | 406 | 419 | 5771 |
| Solar radiation, global, Mj/m2 | 13 | 13 | 13 | 15 | 17 | 17 | 17 | 17 | 15 | 14 | 15 | 15 | 15 |