I build free map sites such as Trainrouter, Castlemap and Filmmap. The world sunshine map settles a question I could never answer properly. If I want sun in a particular month, where should I go?

It covers 3,833 destinations in 235 countries. Look up anywhere you are considering and you get its sunniest month, annual sunshine hours, and a month by month breakdown of temperature, rain and UV, plus sea temperature on the coast.

https://thesunshinemap.com/

There are no ads and no sign up. It only covers places with an airport, so it is a map of where you can fly rather than every town.

Happy to answer anything and feedback is always welcome.