If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Kavieng: The hottest months are usually May and November with an average temp of 83°F, while the coldest months are July and August with an average of 82°F. The rainiest months in Kavieng are July, March, May, and April, with each month seeing an average of 17 inches of rainfall.