My daughter 1.3 yrs old have been suddenly peeing too many time around 16 times between 4 pm to 9 pm today. She is not showing any sign of irritation nor she's crying. What could be the reason? Anything should I worry about?

It could be due to the cold weather. You can limit her water intake after 4 every evening to relieve her discomfort. give her Luke warm water during the morning and day. Please see if she is crying or generally in pain while peeing. You can consult the doctor if the problem persists.