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 Hoa Lu: The hottest months are usually June and July, with an average temperature of 29°C, while the coldest months are January and December, with an average of 20°C. The rainiest months in Hoa Lu are August, September, July and October, with each month seeing an average of 293 mm of rainfall.