1st date tomorrow. We're getting Smoothies and going up the street to a park to catch the sunset. Unsure what I should do here

So if we meet at 6:30, it's going to be like 100 degrees out.

If we meet right at 7 pm, it's going to be much cooler, but it'll be totally dark by 8:30.

(I live in a state that cools off by like 20 degrees right after sunset).

The first one will probably make her feel safer since it's bright out.

The second one is a hell of a lot more romantic even though we'll be leaving the park at night.

Thoughts?