How normal is TPMS coming on in cold weather?

Hi all,



Since I got my 8 in the summer I haven't seen the TPMS dash light come on before as I keep an eye on my tire pressure, but recently with the temperatures reaching 20-30 degrees F I've been having the TPMS light come on.



I read somewhere that for every 10 degrees the temperature drops your tires lose 1 psi, but I haven't noticed any bulging of the sidewalls that would indicate unnecessarily low tire pressure.



So my question is just to long-term owners who have driven their 8 in cold and hot weather what your experience with the TPMS light is and if this behavior I'm experiencing is normal.



Thanks!