You would think that someone with a name that LITERALLY MEANS "Sun" would appreciate hot weather, but nah. Elio hates stupidly hot and humid (especially humid) weather, because of how much it fucks with his hair and skin while making him sweat more than usual. Just because he learns to deal with it via Molesurya, being stuck in locations with either naturally or artificially high temperatures, and frequenting tropical locales situated near the equator, while filtering most of the heat through a naturally-produced Aura-coated epidermal layer once he reached a certain level of Aura mastery at an early age, doesn't mean he likes it nonetheless. Especially since he's prone to wear black, which typically absorbs an abundance of heat.

Regardless, it doesn't mean that summer doesn't have perks that he loves to exploit. When he was still in school, he would participate in mandated camping trips - usually related to Aura/survival training, family vacations, or summer outings in Undella Town or other parts of Unova. Now, he would like to either visit tropical islands or other summer-based cities or towns - going sightseeing, enjoying the beaches and resorts, and doing other touristy activities (that's if he's not being hounded by either paparazzi or his rabid fans).