A very <em>interesting </em>way to state that the character has bloomed/matured/grown. It's visible this character has grown physically/emotionally/mentally. And the author wants you to see that.
Most of them...
I'm pretty sure in the Florida-ish area...
The weather forecast for the day, or rather what we can assume the
predicted forecast is due to the preparations the family are making,
will likely be a hot and sunny day, with a lot of humidity. We can
establish this due to the fact that sunscreen is being packed, combined
with the fact that Becca will need her inhaler.