It depends a lot on when the warm arrives. Here in the American Pacific Northwest, as the local joke goes, summer starts on July fifth and ends the Friday before Labor day. Some years that's actually true. So, my Owari didn't bloom until mid-May and it never got ripe, which is why I eventually exposed it to the frost gods to test its hardiness. (18 Fahrenheit, in case you care). Short season Satsumas, like LA Early or Okitsu do manage to ripen here. They all need winter protection, even in a zone 8b.
Jim