should I take a job knowing that I’ll have to be gone for a month in January?

I’m thinking about applying for a long-term job! However, I have some family matters to take care of in January and I will have to leave for a month. Should I still apply for jobs and take offers and tell them? Or should I just work a temp job and start finding long term job when I come back from January? Any help is much appreciated thank you so much!!