Common information
CountrySouth Africa
Population91 548
Weather, climate, temperature by months in Grahamstown
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Average high, °C | 19 | 20 | 21 | 23 | 24 | 23 | 23 | 22 | 21 | 20 | 20 | 19 | 21 |
| Average temperature, °C | 16 | 16 | 18 | 20 | 21 | 20 | 20 | 18 | 17 | 15 | 15 | 15 | 18 |
| Average low, °C | 12 | 13 | 14 | 16 | 17 | 17 | 16 | 14 | 12 | 10 | 10 | 10 | 13 |
| Average precipitation, mm. | 73 | 109 | 120 | 115 | 118 | 125 | 126 | 72 | 50 | 37 | 36 | 50 | 1031 |
| Relative humidity, % | 66 | 70 | 71 | 70 | 71 | 72 | 73 | 70 | 64 | 60 | 58 | 60 | 67 |
| Wind speed, km/h | 16 | 18 | 17 | 17 | 17 | 16 | 14 | 13 | 13 | 13 | 14 | 15 | 15 |
| Day Length, часов | 12 | 13 | 14 | 15 | 15 | 14 | 13 | 12 | 11 | 10 | 11 | 11 | 13 |
| Dew point, °C | 9 | 11 | 13 | 15 | 16 | 17 | 16 | 13 | 9 | 6 | 5 | 7 | 137 |
| Growing degree-day, °C | 158 | 198 | 217 | 284 | 319 | 275 | 284 | 233 | 189 | 150 | 155 | 138 | 2600 |
| Solar radiation, global, Mj/m2 | 18 | 20 | 22 | 24 | 23 | 21 | 18 | 15 | 12 | 11 | 12 | 15 | 18 |