Going to Gwangju in June to July? Weather? What to wear?

[Sadie]

Hi. I'm going to Gwangju for a vacation in June-July. What will the weather be like? I'm from a tropical country if that helps. What should I wear? I think Korean women are very fashionable. What's the in thing nowadays with fashion?

I know women wear heels all the time. Is it easy to walk around the city in heels? Thanks!