YOU SAID:

I was watching the weather to decide whether I would dye my trousers today

INTO JAPANESE

今日ズボンを染めるかどうかを決めるために天気を見ていた

BACK INTO ENGLISH

I was looking at the weather today to decide if I wanted to dye my pants.

INTO JAPANESE

今日は天気を見てズボンを染めたいかどうか決めていた。

BACK INTO ENGLISH

I was looking at the weather today and deciding whether I wanted to dye my pants.

INTO JAPANESE

今日は天気を見て、ズボンを染めたいかどうか決めていた。

BACK INTO ENGLISH

I was looking at the weather today and deciding whether I wanted to dye my pants.