Why is Phoenix hotter than San Diego?

Answer 1

Phoenix is hotter than San Diego primarily due to its desert climate, which features high temperatures and low humidity, while San Diego benefits from a coastal Mediterranean climate that moderates temperatures with ocean breezes. Additionally, Phoenix is located further inland, which contributes to more extreme temperature variations. The urban heat island effect in Phoenix also exacerbates the heat, as the city’s development absorbs and retains heat more than the natural landscapes surrounding San Diego.