I know Saipan is in the Guiness Book of World Records for their fewest lack of temperature swings, and stay moderately the same temperature year round, you can almost bank on a high of 87 and a low of 76 from Jan to Dec. The surrounding water creates beautiful trade winds and keeps the island from getting too hot. Nights are very pleasant with great breazes. You don't sweat like a hog walking around, not as humid as mainland kind of places like Philippines for some reason is way hotter than Saipan/Guam. Saipan is about 120 miles northeast of Guam.