Blake and Castiel
Snow didn't bother Castiel in the slightest. Extreme cold or heat didn't affect him at all, so he was roaming around town in his usual choice of clothing. He had heard of the organized snow party in the park, so he decided to head in that direction. He had nothing better to do, and experiencing snow in June in North America was strange. So why not?
He smiled slightly when he spotted Blake headed in that direction as well, and he quickened his pace until he was walking beside the man.