“The saying ‘April showers bring May flowers’ itself actually originates from the United Kingdom, where April for them is one of the more soggy months based on the position of the jet stream. Since this area typically has a cooler climate, the lower temperatures often push back the appearance of flowers to late April and early May. The phrase is also believed to come from an early poem with a line that goes, ‘Sweet April showers, do spring May flowers’.”
https://blogs.missouristate.edu/international/2021/04/30/learn-english-proverbs-april-showers-bring-may-flowers/
