In Cambodia the best place by far is the Angkor Wat temples just outside of Siem Reap. Siem Reap itself is a nice town with plenty to see and do, but 3 or maybe 4 days should be enough. Otherwise you have Phnom Penh, which isn’t too special, or Sihanoukville, which is a pleasant beach town that doesn’t really match up to most of what you are used to in the Philippines.
Australia is so large and varied that one cannot simply say ‘go to Australia in November’ and expect everything to be fine beachy. That said, November is probably as close as it gets to being perfect weather country-wide. The tropical rainy season in the North hasn’t properly settled into humid downpours yet, while the cooler southern states of Victoria and Tasmania are shaking off the winter frost and basking in warmer days. Vino and meals are taken al fresco, outdoor music and food festivals pop up everywhere, and beaches across the country begin to buzz.
Pay homage to the Native American heritage of the U S of A by taking in the sights and sounds of Arizona’s capital city for pure rest and relaxation before the holiday season. Phoenix anchors a sprawling, multicity metropolitan area known as the Valley of the Sun, which is highly regarded for its luxury resorts, vibrant nightclubs, designer golf courses, and long lasting sunshine and warmth—even through the winter months. Attractions include the Heard Museum and the Pueblo Grande Museum & Archaeological Park. Be sure to check them out!
It would help to know your starting location, but I’ll assume it’s the US or Canada because you didn’t say. My first thought for this is Argentina, which of course is in mid spring in late October. Buenos Aires is a wonderful city with great food and culture. You could also visit Mendoza, which is the lovely wine region, and Bariloche, which is a mountain resort area with year-round activities and such. Then there is always the amazing Iguazu Falls on the border with Brazil and Paraguay. It’s by far the most amazing waterfalls and area I’ve seen. Things are pretty cheap in Argentina these days for outsiders because of their weak currency. It’s also got very good outdoor activities in many different areas that should have nice weather in late October. It’s easier if you know Spanish, but still doable if you don’t. I don’t speak Spanish and I enjoyed it so much I stayed for a month. Let me know if you have something else in mind and I can try again. -Roger
There is no better time than December to discover a still (somewhat) under-the-radar part of the Caribbean. This verdant, five square mile island has seen a lot of activity recently, from a new mega yacht club to a Soho House to the Mandarin Oriental's first property in the Caribbean. More is on the horizon for this picturesque piece of paradise, but go before everyone else discovers it.
While it's true that it might be a stretch to call Cusco's November weather “great,” this is perhaps the best month of the year to visit, and the weather is quite good anyway. The high season for hotels in Cusco ends in October, yet the rainy season doesn't begin until late December, so November is that perfect combination of small crowds, low prices, and very good weather.
If your real goal is to sit on a European beach and not freeze or be alone in December, your only real choice is the Canary Islands. Tenerife is the largest of them, and the best one for English speakers. The average high in December there is 22C with 16C as a low, and in December it’s packed with Swedes and Brits and Germans who actually do sit on the beach or around pools, even though it’s a bit cool for most of us. It’s important to note though that the Canary Islands are technically part of Europe because they are a territory of Spain, but only the largest cities on each island are “European” at all. The beach resort areas are quite generic, and not very special aside from the pleasant weather and modest prices.
If you are interested in a place that isn’t focused on beaches in that area then I’ll point you to some recent answers just above where I mention the charms of Chiang Mai in northern Thailand, or Luang Prabang in Laos, and/or Siem Reap in Cambodia. All of those are wonderful places with temples and other sights, and they are quite affordable once you are there as well.