If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Ulhasnagar: The hottest months are usually April and March with an average temp of 85°F, while the coldest months are January and December with an average of 79°F. The rainiest months in Ulhasnagar are July, August, June, and September, with each month seeing an average of 19 inches of rainfall.