We ask for the best possible weather for a particular time and day - we don't stipulate that sunshine is a requirement, we let the gods choose, because firstly you get what you ask for and secondly you never know quite what you are asking for with respect to repercussions with regards to weather magick (think butterflies flapping wings and causing hurricanes elsewhere).
Does it work?
Nearly all of our couples have had excellent weather - often miraculous! Sometimes we draw our curtains back on the day of a ritual, see the weather and think 'oh no' but, by the time we get to the site, the sky has cleared.
Once we performed a ceremony in light rain and, just as we finished, the couple had the most magnificent double rainbow appear ... we think that was a sign that our Skull Splitter magick had still been successful.
We remain incredibly grateful to Louise Park for sharing this ritual / spell with us - thank you!