A four-stop loop around the world that holds an average monthly temperature of 1.6°F from 72 — and, because 72° and miserable is still miserable, lands every stay inside its dry season. Eastbound, three months per base, 25,531 miles.
Average daily temperature at whichever base you are living in that month, against the 65–80°F comfort band. Bars below are that month’s average rainfall.
A calendar quarter is longer than a tourist visa. Three consecutive months runs 91 or 92 days; Morocco, Namibia and visa-exempt Thailand all stop at 90. Every leg except Oaxaca is over the line by one to two days if you move on the first of the month. Shift each stay to about 88 days — or carry Thailand’s DTV and Morocco’s police extension — and the problem disappears.
The purist route is warmer on paper and wetter in practice. Optimising for temperature alone produces Oaxaca → Essaouira → Bangalore → Da Nang, which sits a remarkable 0.9°F from 72 all year. But it puts you in Bangalore for the northeast monsoon and Da Nang for its wettest three months — about 49 inches of rain across the year, against 7 on this one. Same temperature, entirely different experience.
The exits matter as much as the arrivals. Three of these four bases are timed to leave just before something unpleasant: Oaxaca before the June rains, Windhoek before the December heat, and Chiang Mai before burning season. That is not a coincidence — the 72° window and the good-weather window are the same window, and both close.