The finest time to visit kodaikanal is from April to June or August to September, So, this is the best climate to visit kodaikanal.
Generally, Temperatures stays in the region of a comfortable 20°C to a bracing 10°C.
If you are person who would be interested in attending flower-shows, dog shows, boat- races, then “may” month would be the best time for you to visit kodaikanal.
During this season, kodaikanal will be little crowded than usual.
Oct to March is likely to cold with some rains as well but it is still a charming place for a quiet break at that time of the year. If you can take the cold we would recommend this time when things are very quiet. Towards the end of march weather is starting to heat up and crowd starts to come in again.