You should expect temps anywhere from -40 to 80 C.
In all seriousness, it is impossible to tell without knowing every single variable in this question. To answer your question with any amount of reliability, we would have to know your ambient temperature, motherboard, manufacturer, anyt and all devices you have in your system, what type of case you have, how many and what type of case fans you have, where you live, what your altitude is, etc etc.