patch of sunshine after rain
Refers to a stretch or patch of sunlight that appears when rain has stopped or is still falling lightly, often creating a dappled effect.
A patch of sunshine broke through into the garden after the rain.
Patches of sunlight were beautifully shining on the mountainside.
Compound of 偏 (へん, 'partial, biased') and 照り (てり, 'sunshine'). The exact historical derivation is uncertain, but the word literally suggests 'partial sunshine'.