HI, with cold weather kids tend to pass urine more often. But nonetheless Its advisable to do a urine routine test and consult your pediatrician.

Hi there I understand your concern...sometimes due to sudden weather change in evening, baby passes urine with increased frequency and that is too normal, or baby fluid intake increases as the day passes ,thats how baby results in passing urine with greater frequency...Common causes of overly frequent urination in children include blockages in the urinary tract, pollakiuria, voiding dysfunction and a urinary tract infection, or UTI...Consult nearest pediatrician they will do the needful.