Sun dogs, the bright false suns beside the real one, are read as doubled vision: two versions of the same truth, or an echo of something important. Old weather lore took them as a sign of change in the air.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.