expression
good weather never lasts for three days in spring
Proverb meaning that spring weather is changeable and sunny spells are brief.
春に三日の晴れ間なしと言うから、明日はまた雨かもしれない。
As the proverb goes, good weather never lasts for three days in spring, so it might rain again tomorrow.
A traditional Japanese proverb reflecting the unstable spring weather.