Advice please

Crystal

I have a 3 1/2 month old daughter and my mom is going to knotts berry farm with my siblings and my bf and I were invited (we’d be taking our daughter) we would love to go because we know my mom can watch her while we go on rides BUT my issue is that it will be 91°. I breastfeed her and we had taken her to a fair for about 4 hours but it was from 6-10pm so it was cooler. I feel wrong for wanting to go like it may be an irresponsible choice knowing it will be hot. She has a little portable fan but I’m not sure it will be enough. Any advice? Should I not go or has anyone else gone to a theme park with such a little one? Thank you for the advice or tips. If you can’t tell already I’m a FTM lol.