I have seen rain cause colored spots on my roses. No fungus here.
Just bugs.
"Theo Asir" wrote in message
news:2ea0301f3c8b253409f77fc53733a427@TeraNews...
You have botyritis.
Time to spray.

--
Theo in Zone 5
Kansas City

"Jerome Morrow" wrote in message
...
Same thing happened to one of my iceburg roses. Its next to several red
roses including a Mr Lincoln and now it has red spots all over the
flowers.

I think that its partly due to the weak nature of the particular plant.
Another iceburg in the same bed, which is stronger, is not affected.