Climate Changes - Uncharted Territory

Spring appears to have stalled big time, at least in my area. The bees had built up at the end of March in the unseasonable hot weather. Then someone mentioned drought and April has been cold and wet. The bees have almost become confused with a lack of forage and swarming impulses put into a spin, some are swarming others kicking drones out! Stores have diminished and dwindled and feed has gone back on. The fields of Yellow Rape are glaring everywhere but it is too cold for the flowers to yield any noticeable nectar flow. The bees are tetchy (seems to be when the Rape is out) and protective of what little stores they may have. In my time bee keeping I have never come across this before. I really hope it warms up and dries up a little, and soon !