well, weather spells, despite some people not believing in them, I believe to be powerful and rather easy to use if someone learns to bend the elements. I used to do weather magick a lot but I decided usually it wasn't a great idea because there can be some effects to it that can cause issues (like causing really bad storms if you're angry or upset).
With weather magic it's not easy to just stop. Take a more practical approach, check the local and national weather. Find out what the general pattern will be and do a spell that is more conducive to sunnier or dryer weather. Take in mind you want to bring a natural balance. Asking for nothing but sun could cause a drought.