First, it is important to define the meaning of a "temporary place." Would that be a hotel room while traveling for a couple days or would that be an apartment while living overseas for several months?
In general feng shui terms, it is considered that the deeper energy of a home, or its feng shui, will not influence the inhabitants strongly till sometime in between the 3 to 6 months period.
Now, this is a very general timeframe and the timing very much depends on the strength of one's personal energy.
It is important to understand that in the meaning of the feng shui of the place, as used here, the basics of a healthy home, such as clean space, clean air, good light, etc, are not included.
You have to have these feng shui basics in any space in order to maintain a general sense of well-being. The basics of a healthy space always come first before any bagua concerns.
I know some people who will quickly check a hotel room for its bagua and make the proper adjustments, such as 2 crystals in the Southwest, or a small water image in the North, for example; even if they are there for just one night.
And then there are people who do not worry much about the bagua of a temporary place but very much focus on its health aspects, such as clean air, good light, etc.
Which approach sounds better to you? It is only up to you to decide.
It might be a smart idea to have a small compass with you while traveling for extended periods of time, so as to be able to make better feng shui decisions if you have to stay in a place longer than a couple days.
How to make smart feng shui decisions for a better energy flow? You make good decisions by understanding the feng shui bagua, and then adjusting the room elements accordingly.
Hope this helps!