Avoiding the monsoon season, rest of the whole year is perfect to visit the Corbett National Park. So, from Mid-November to Mid-June visitors can come here at any time.
If you are planning to visit during the winters, make sure to carry proper woollen clothes as the temperatures may drop during early mornings and in the evenings.
During summers, the climate is very comfortable and mornings and evenings are very enjoyable for sightseeing and bird watching.