User blog comment:Xilinoc/Ch. 542 - THE BLADE IS ME/@comment-4207271-20130620040906/@comment-4431351-20130622211441

I agree with you, Xilinoc. The rain has always been a symbol in Bleach regarding Ichigo. As you said, Masaki died on a rainy night and Zangetsu hated the rain because it was a sign of Ichigo's sadness. And of course, even during White's and Isshin's fight, it was raining. Ichigo and the rain have always been connected. However, I don't think it goes any further than a symbolic meaning.