Sound travels faster on a rainy day than on a dry day. Does it imply that speed of sound in moist hydrogen is greater than in dry hydrogen ?

Explanation

Speed of sound is inversely proportional to the density of gas. Density of moist air is less than the density of dry air because dry air comprises of nitrogen and oxygen molecules mainly, which are heavier than the water vapour. So, when water vapour replaces some of the nitrogen and oxygen molecules, the air becomes less denser.
But in case of hydrogen gas, speed of sound will be less in moist hydrogen than in dry hydrogen. This is because density of water vapour is more than that of hydrogen.