My Azaela has turned a yellow color. I don’t believe it’s ever turned this color in the fall/ winter. It doesn’t appear to be chlorosis.
Jefferson County Kentucky azaleas
Thank you for your question. There are several diseases that cause browning leaves in azaleas, as well as several insects. Here is one Extension article which explains the causes and symptoms of diseases: https://hgic.clemson.edu/factsheet/azalea-rhododendron-diseases/
It is difficult to diagnose a problem without being able to examine the leaves closeup. I suggest you contact your local Extension office to see if a staff member can look at your plant's leaves to determine the problem(s). Here is their webpage: https://jefferson.ca.uky.edu/