won't start at the first time when cold

The temp. is dropping to around 20 over night now. The 1999 T&C often refuses to start at the first attempt but it always fires up the second time. New battery just put in 3 months ago.
The first time I turned the key, it seems nothing goes to start the engine...

Is it a sign of something?

Vac. leak maybe. how many sec were you cranking it for and how long did you wait to start it the second time?

It does not even crank at the first try, I turned the key back and retry again with no problem.

Does it always do this? hhhmmmm, bad cell it batt could cause this. even a new batt can have a bad cell.

Actually, it happened even when the van is relatively new with other battery.

hhhhhhhmmmm.Im not sure, im sorry.