The best time to visit is March-June, during spring or August-December, during autumn. The weather in Kolli Hills is generally pleasant. It is wise to avoid peak winter or monsoon months as the temperature gets quite cold in this mountainous terrain.
| Month | High/Low (°C) | Rain |
|---|---|---|
| January | 26°/ 15° | 3 days |
| February | 28°/ 15° | 0 days |
| March | 30°/ 16° | 3 days |
| April | 31°/ 18° | 11 days |
| May | 33°/ 21° | 16 days |
| June | 32°/ 20° | 14 days |
| July | 29°/ 19° | 13 days |
| August | 27°/ 18° | 17 days |
| September | 27°/ 18° | 21 days |
| October | 26°/ 17° | 29 days |
| November | 25°/ 17° | 19 days |
| December | 24°/ 16° | 4 days |