Groom Changing after Ceremony

I think it would be quite nice to change, especially if the dress outfit tend to show sweat stains. On the downside, I'm not sure how much cooler a tux would be.

If I may ask, is he not wearing a dress uniform, and are they any better, sweat-wise? I'd imagine both service and dress uniforms would be quite hot, since they're heavy with all the braiding etc so there's probably not much difference between the various iterations.

I don’t think it’s weird at all. He can do it during the cocktail hour.

Not weird at all! My groom is going to have a hot tweed suit on during the Ceremony & will change to a cooler outfit for our reception. He even purchased new semi-dressy shoes for the reception he is calling his "dancin' shoes." lol

I have a friend who is a marine and wore his dress uniform for the ceremony and changed to a tux for the reception, so no nothing wrong with an outfit change

Back when I was in the Army (sooo long ago) this was what people usually did. Ceremony with the uniform (and sometimes first dance) then a change of clothes.
This was long enough ago that the dress uniform was awful polyester so that was reason enough!

I don't see any reason why the groom couldn't change into something more comfortable!