The best season to visit Harsil is in between April to June and September to October. The climate remains pleasant during these months offering tourists the best holiday experience. Summers are pleasant with moderately cool climate in Harsil.
Weather Harsil april:
On average, it is maximum 29° in april in Harsil and at least around 15° degrees. In april there are 7 days of rainfall with a total of 19 mm and the it will be dry 23 days this month in Harsil.
https://www.euttaranchal.com/tourism/harsil-weather.php