Outdoor Flower Temp

Hey everyone great forums here- I had a question about the temps for flowering. I want to transfer my plant outside to flower but its not going to be ready for about 3 weeks. That puts me in mid september, putting my harvest time somewhere in mid november. Around here the temps probably won't freeze by mid November but could be upper 30's all the way up to mid 70s in the day. I'm wondering if these temps would be ok for flowering or no.

Upper 30's is way too cool for flowering.

The lowest I have heard of is high 40's.

In fact, if you have strains that can result in blues and deep purples, 50's are the only temps these colors will really reveal themselves in.

I think 30's is just too low for most common strains.