fickle weather; unpredictable weather
Describes weather that changes suddenly and unpredictably, often with a nuance of being erratic or crazy. The term 気違い (crazy) is now considered a discriminatory word, so this compound may be avoided in polite contexts.
Today's weather is fickle; just when I thought it was sunny, it suddenly started raining.
A more neutral and common expression for changeable weather, without the potentially offensive nuance of 気違い.
Standard kanji spelling.
Irregular okurigana usage; less common variant.
Compound of 気違い (crazy, mad) and 日和 (weather, fine weather). The exact origin is uncertain, but it likely arose as a colloquial metaphor for weather that seems to act crazily.