Chennai
India
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 34 | 38 | 36 | 32 | 32 | 37 | 39 | 42 | 41 | 38 | 35 | 36 | 42 |
| Average high, °C | 29 | 32 | 31 | 29 | 30 | 32 | 36 | 38 | 37 | 32 | 28 | 28 | 32 |
| Average temperature, °C | 24 | 25 | 22 | 20 | 20 | 22 | 26 | 29 | 29 | 27 | 25 | 24 | 24 |
| Average low, °C | 21 | 19 | 15 | 12 | 12 | 13 | 16 | 20 | 22 | 23 | 22 | 21 | 18 |
| Record low, °C | 16 | 11 | 7 | 5 | 6 | 6 | 10 | 13 | 15 | 20 | 20 | 16 | 5 |
| Fog, days | 1 | 2 | 3 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
| Thunderstorms, days | 7 | 3 | 1 | 0 | 0 | 0 | 1 | 3 | 6 | 5 | 1 | 0 | 27 |
| Average precipitation, mm. | 125 | 88 | 26 | 6 | 1 | 1 | 3 | 14 | 34 | 125 | 175 | 106 | 704 |
| Relative humidity morning, % | 91 | 91 | 89 | 87 | 85 | 76 | 66 | 64 | 73 | 83 | 88 | 90 | 82 |
| Relative humidity evening, % | 72 | 51 | 43 | 39 | 33 | 25 | 20 | 25 | 36 | 64 | 76 | 78 | 47 |
| Wind speed, km/h | 6 | 4 | 4 | 4 | 4 | 6 | 6 | 6 | 8 | 9 | 8 | 8 | 6 |
| Day Length, часов | 13 | 12 | 12 | 11 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 13 | 13 |
| Dew point, °C | 20 | 17 | 13 | 11 | 10 | 8 | 8 | 11 | 16 | 20 | 21 | 20 | 175 |
| Growing degree-day, °C | 448 | 475 | 379 | 326 | 338 | 353 | 497 | 570 | 612 | 522 | 467 | 448 | 5435 |
| Solar radiation, global, Mj/m2 | 17 | 19 | 18 | 17 | 18 | 20 | 23 | 24 | 24 | 18 | 14 | 14 | 19 |