I'm not sure I understood your question but may june, August and September are the best months to visit ZION.
Winter is cold but not busy, summer is busy but make sure you make reservations.
Winter better than summer. I went in January, amazing! All entries were opened, few cars, no traffic, trails, access, and park service ok, wildlife.
Right now is a good time because it is less crowded. ..
We went there during the winter, it was too foggy. Been there in May and September it was great.
We've only been once, but I must say, September of 2017 was very nice. We stayed at Zion Canyon campground, its about a quarter mile outside the gate. Nice campground I would go back.
Alot less people in winter I went last month and in jan was great cold at night nice in day...
March to May, great weather it's still busy but not too crazy!
Right before summer season (march). During summer hundreds of cars line out to enter the park and it look like Disneyland. Water in 'the narrows' will be really cold, so rent the waterproof gear!!!
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