The weather hurt the Japanese.

There is nothing wrong with these three sentences. . . The meaning is roughly the same, but the tone is different.

The weather was bad yesterday.

Yesterday はぃぃではぁりませんでした. Yesterday was not a good day.

Yesterday was a good day, a good day, a good day, a good day, a good day, a good day. The weather was bad yesterday. (Emphasize the weather)

Yesterday, the weather was bad

Let's say a few more words: yesterday's よくなかったです

Yesterday was a day.

Yesterday's よくなかったはでした (です).

Is it wrong? I think so.