Planning for the weather is a good way to make your trip to Cua Lo relaxing and enjoyable, especially when you’re splurging. The hottest months are usually June and July with an average temp of 85°F, while the coldest months are January and December with an average of 68°F. The rainiest months in Cua Lo are October, September, August, and July, with each month seeing an average of 12 inches of rainfall.