Better sound on rainy days?

FM tuner reception is clearly better on cloudy days. I have not noted any equivalent weather difference when live-streaming the same signal (often, in various weathers, I A/B the two, analog vs. digital). The "atmospheric conditions" explanation has always seemed true to me. 

Temperatire yes, air pressure and then ionization...

Ionization play a role very important because it affect the body too and not only the diffusion of the waves...

@mitchb I’ll have to admin I do agree! Also, never test drive a car on a rainy day. They drive smoother a quieter. I know that has nothing to do with why our audio systems sound on a rainy day but was the only analogy that came to mind. interesting that you should bring this up. 

Rainy days and Mondays always get me down or so says the Carpenters. Sorry, it just popped into my head.

JD

In rainy day the car works better because a more ionized mixture of air and fuel than usual mixes improve the fuel’s combustion.

The body of the driver is more relaxed too....

Rainy day,dreamy day....