Johannesburg
South Africa
Common information
- Country
- South Africa
- Population
- 5,939
Weather, climate, temperature by months in Port Saint John's
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 39 | 41 | 37 | 32 | 31 | 32 | 33 | 34 | 34 | 32 | 33 | 36 | 41 |
| Average high, °C | 21 | 22 | 22 | 24 | 25 | 25 | 25 | 23 | 23 | 22 | 21 | 21 | 23 |
| Average temperature, °C | 18 | 19 | 20 | 21 | 22 | 22 | 22 | 21 | 19 | 17 | 17 | 17 | 20 |
| Average low, °C | 15 | 16 | 17 | 18 | 19 | 20 | 19 | 17 | 16 | 13 | 13 | 13 | 16 |
| Record low, °C | 6 | 7 | 7 | 11 | 12 | 11 | 11 | 11 | 8 | 5 | 6 | 6 | 5 |
| Rain, days | 6 | 8 | 8 | 9 | 9 | 10 | 9 | 6 | 5 | 3 | 2 | 3 | 78 |
| Average precipitation, mm. | 77 | 103 | 122 | 104 | 113 | 116 | 128 | 84 | 58 | 34 | 41 | 49 | 1029 |
| Relative humidity, % | 79 | 81 | 83 | 83 | 83 | 84 | 83 | 79 | 73 | 67 | 68 | 73 | 78 |
| Wind speed, km/h | 14 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 9 | 10 | 12 | 12 |
| Day Length, часов | 12 | 13 | 14 | 15 | 14 | 14 | 13 | 13 | 11 | 11 | 11 | 11 | 13 |
| Dew point, °C | 14 | 15 | 17 | 18 | 19 | 20 | 19 | 17 | 14 | 11 | 11 | 12 | 187 |
| Growing degree-day, °C | 231 | 264 | 294 | 350 | 381 | 350 | 369 | 315 | 279 | 216 | 211 | 220 | 3480 |
| Solar radiation, global, Mj/m2 | 16 | 18 | 20 | 21 | 22 | 21 | 18 | 15 | 12 | 11 | 12 | 14 | 17 |