The rainy season usually ends early in November in Siem Reap, and the tail end of it is rarely fierce, so this is an ideal month to hang out in town and spend multiple days at Angkor Wat. November is actually the coolest month of the year, by just a bit, at least during the days, so most people will appreciate more moderate temperatures when climbing up and over all the temples.
December is a popular month to go cruising around Hawaii and Mexico. It’s an ideal family trip, especially with most kids in the US out of school for the holidays. Experience the Hawaii’s tropical paradise. Pick a popular cruise liner and visit ports of call like Nawiliwili on Kauai, Honolulu on Oahu and Kona on the Big Island. If the Caribbean floats your boat, we recommend taking a cruise to explore Mexico’s Costa Maya, Cozumel, Ensenada, Acapulco, Cabo San Lucas, Puerto Vallarta and more.
My top recommendation would be San Juan, Puerto Rico. It offers a wonderful mix of history and culture and nightlife and great food, alongside excellent beaches and abundant activities. Hotels and rental apartments are mostly in the mid-range for the Caribbean, but food and drinks and most other things are great value. You could get a place in the Condado area, which is close to the lovely Old San Juan neighborhood and plenty of nightlife all around. And then perhaps you could rent a car and stay for a few days at one of the smaller beach towns elsewhere on the island. You wouldn’t even need a passport, although it does feel fairly exotic while you are there. But because it’s part of the US, it’s also well organized and safe. Most people you’ll meet will speak at least some English, and many are fluent, so it’s easy even if you don’t speak Spanish.