If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Lalitpur: The hottest months are usually June and April, with an average temperature of 21°C, while the coldest months are January and December, with an average of 12°C. The rainiest months in Lalitpur are July, August, June and September, with each month seeing an average of 683 mm of rainfall.