There’s also plenty of pleasant weather to go around. Average temperatures are between 64 degrees in the winter and 81 degrees in the summer. However, temperatures in June, July and August often top 90 degrees with high humidity that can make the heat feel more intense. Although there are more sunny days, summer brings 0.24 inches of rainfall., Four of its cities rank in the top 10, and the state occupies all top three spots. Sacramento is king when it comes to pleasant weather. With sunshine 81% of the year, warm summers that are tempered by breezes from the San Francisco Bay, and mild winters that average 55°F, the city can boast the best year-round weather in the country., With an air quality score of 41 and an average summer temperature of 76 degrees, Fort Mill has the best weather in the country. The climate of Fort Mill is mostly gloomy all year round, with hot, humid summers and severely chilly, damp winters. The average annual temperature ranges from 33 to 90º F, rarely falling below 21 or rising over 96., San Diego is often celebrated as the US city with the best year-round weather. Renowned for its mild, Mediterranean-like climate, San Diego enjoys warm, sunny days and cool, comfortable evenings throughout the year. The city rarely experiences extreme temperatures, making it an ideal destination for those seeking a pleasant climate all year round., If you’re one of those people who can’t get enough of pleasant weather, we’ve got you covered! We’ve compiled a list of the top 10 U.S. states with the best weather year-round. As you might have guessed, all the states with the best weather are in the southern US. This is thanks to this region’s generally subtropical and tropical climate., Overview: Key West is a tropical paradise, with warm weather year-round and plenty of sunshine. Climate Highlights: Average temperatures are consistently around 75°F to 85°F, making it perfect for outdoor enthusiasts. Why it Made the List: The tropical climate makes Key West one of the best places to live for warm, sunny weather all year long..