Yay for interactive maps! But booo for depressing stats. 

This map looked at a LOT of cities across the US and decided how many "pleasant" days each one had... basically- temperatures between 55 and 80, without much precipitation.

DC: 48-66 pleasant days [depending on the suburb]

SALT LAKE CITY: 39 pleasant days

VIRGINIA BEACH: 70 pleasant days

And of course LOS ANGELES has over 180 pleasant days. Must be nice.

Check out the whole interactive map below: