Planning for the weather is a good way to make your trip to Rajshahi relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and May with an average temp of 86°F, while the coldest months are January and December with an average of 71°F. The rainiest months in Rajshahi are August, July, June, and September, with each month seeing an average of 13 inches of rainfall.