If I leave her where she is right now, she gets plenty of afternoon sun (after 13:00h), but I can't protect her from rain. If I move her to a place where se'll be protected from rain (more or less, not 100%), she'll get morning sun (untill more or less 13:00 h). What would you say is more important, sunlight or protection from rain?

From morning till 13:00 will be good enough too. All depends on how much rain you get. I move them in and out of the rain.