First of all, allow me to compliment your skill as an artist. Your drawing is really beautiful, and I feel it conveys the right mood.

I agree with you at how wonderful something so simple as the rain can be. And maybe it's because of its simplicity that it can so special.
As if when the rain started, the nature is telling us that we need to relax, let the purity of its drops wash away our stress, our worries and our overbearing thoughts, and just sit there, listening, watching and reconecting with ourselves and what is around us.
I think it helps us soothe our minds, our bodies and even our souls, to just take a moment to appreciate this little great things (which I just recalled is the idea of this artwork) and I feel you really capture that in your drawing.
Good luck on your challenge and keep up this amazing work @karenthfer!