Weather will likely play an important role when you plan your trip to Hopin, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 82°F, while the coldest months are January and December with an average of 69°F. The rainiest months in Hopin are June, August, July, and September, with each month seeing an average of 14 inches of rainfall.