Will the weather affect musical instruments?

The humidity of the air will directly affect the sound quality of musical instruments and many other aspects.

However, the impact should usually not be great. Just pay attention to protection.

Bad weather will affect not only the players, but also everyone.

So your situation should be both factors.

Suggest to calm down. The progress of music learning is wave-like and sometimes even retrogressive. Everything is normal, which is a harbinger of greater progress.