Bad weather — conditions such as storms, heavy rain, or dense fog that hinder outdoor activities.
悪天候のため、空港のフライトが全便欠航になった。
Due to bad weather, all flights at the airport were canceled.
山登りは悪天候が予想される日は避けたほうがいい。
You should avoid mountain climbing on days when bad weather is expected.
悪天候で運送が遅れ、商品の到着が一日遅れた。
Shipping was delayed by bad weather, and the delivery arrived a day late.