4. Sacramento, CA
In 2016, Medium ranked Sacramento as having the best climate in the world. Sacramento’s winters are short and cold, the temperature rarely falls below 31ºF. The drier season lasts almost seven months, allowing for low humidity variations throughout the year. This alongside with the pleasant summers makes it an ideal place to live in if you are having sinus problems. Moreover, it will take you only an hour ride to get to the closest beach.