June is called as monsoon month of Coorg. There are heavy rainfalls giving the whole hill station a lush green look. Since temperature varies between 23 to 27 degrees you could travel with a jacket in hand. Carrying an umbrella is advisable, while having an extra sweater just in case in hand would make your trip better.
Please relook in to the dates
if u want relax indoor June is okay
we normally have heavy rains in June as manssoon starts in first wk of June
out door activity is less possible in June
clothing for June
Rain coat / umbrella
rainshoes
warm clothes