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?

while 16 times sounds a lot, it is possible that the quantity may not be that much each time. it is very much possible that she is peeing more due to the onset in winters, if you live in a cool area. give her lesser fluids from evening, but also please check with her doctor to rule out anything else.