Hey Renee_AW, you have answered your own question with yes that in the hot weather we do rather sweat more than wee but thats also why offering more drinks BF FF and /or water is so important as you dont wnt his to become really dehydrated. I would say if he has a couple of really wet nappies from when he wakes to bedtime that is ok . Remember what yoourself is like when talking hot weather and toilet trips.... however as babys' can dehydrate very quickly if you r in doubt ring your local ED and they will give you advise . also they hve advice to keep baby cool as well if you ever need that .