10 day forecasts are good indicators, but they are only forecasts.
I’ve seen predicted stormy days become clear, sunny, and warm.
I’ve also seen warm days become cold days as you get inside the 4 day mark.
And that 30% chance of rain can often as not simply be a threat and the worst you’ll see is clouds.
My point is use the 10 day as some guidance, but still be ready for almost anything.
Well, this time of year, you don’t need to be ready for any temps under 75.