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 Bilaspur: The hottest months are usually May and April, with an average temperature of 33°C, while the coldest months are January and December, with an average of 22°C. The rainiest months in Bilaspur are August, July, September and June, with each month seeing an average of 368 mm of rainfall.