Anything comfortable/casual to the welcome event, and summer semi-formal for the wedding! Please avoid wearing white though! (Except undershirts are fine) For defining summer semi-formal, the link below may be helpful, but know that a suit for masculine attire is not required! Slacks and a button down shirt with tie is good (or a fancy Hawaiian shirt if that is your style). Alternatively, adding a suit jacket and skipping the tie is another option. https://www.zola.com/expert-advice/semi-formal-attire-for-men For feminine attire, a cocktail or mid-length dress would work, but feel free to do a full length dress if desired.
Anything and everything can happen, but hot weather is most likely.