
Japanese has a nice yojijukugo phrase for this: sankan shion (三寒四温) which means “three days cold, four days warm”. This just expresses the common experience where the early Spring weather flip-flops back and forth between cold, cloudy days and sunny ones until the cold days get fewer and fewer.
Or if you live in the Pacific Northwest:
At any rate, nice to see the days getting longer, and (slightly) warmer.