天気が良かったら

if the weather is nice

→ 天気
phrase Rare #36,055
if the weather is nice A conditional expression meaning “if the weather is good.” Despite using the past form 良かった, it can refer to future conditions; with past-time context, it can mean “if the weather had been good.”
JA: 天気が良かったら、海に行きましょう。
EN: If the weather is nice, let's go to the beach.

今度の日曜日に天気が良かったら葉山サーフィンに行かないかい

If the weather is nice this Sunday, why don't we go surfing in Hayama?

天気が良かったら行きます

I'll go if the weather is nice.

もし明日天気が良かったら私たちはピクニックに行くつもりです

If the weather is nice tomorrow, we're planning to go on a picnic.

昨日天気が良かったら私たちは動物園に行っただろう

If the weather had been good yesterday, we would have gone to the zoo.

明日天気が良かったら行きます

I'll go if the weather is nice tomorrow.