Sundays weather...

How can two sites have such different information for Sunday????? One is obviously so much more ideal.
What we know for sure (or what matches in both forecasts):
Not too much wind
Cloudy

These are both good.

What we don't know? 66 degrees or 81? Kind of a big difference. That is definitely warm. Hydration will be important.

Ok that's enough obsessing about the weather for now. I can't change it, I just need to prepare for it!