OK! So it's night time in the desert.
If it is hot or very warm it's summer, even at night.
If it is cold it's most likely winter.
If it is a pleasant temperature or mild, it's anyone's guess.
If you are having difficulty breathing and it is cold, you are on a very high mountain - Andes, Himalayas.
If it is overcast and you don't recognize any on the landmarks, you don't know where you are.
If it is not overcast and you can see most of the sky that's good.
Do you have a very basic knowledge of stars in the night sky where you normally live. If yes good, if not, the stars aren't going to help you.
Look at the sky directly above you. Choose a bright star close to the top of the sky above you. Wait a while. If you have a watch, wait for one hour. Note the direction the star has moved to, the direction it moved to was west.
Do you recognize the pole star. Do you know about the pole star? Is it relevant to your hemisphere? If yes, you normally live in the northern hemisphere. If not you normally live in the southern hemisphere, where the Southern Cross will be of importance.
Having located west by the overhead star, put your left side towards west. Look ahead. You are now facing north. Look for the pole star. If it is high in the sky you are in the northern latitudes. If it is lower in the sky you are likely in the southern latitudes of the northern hemisphere.
If you don't see the pole star you may be in the southern hemisphere. Put west to your right side, as per the overhead star you watched before. You are now facing south.
Do you see the Southern Cross (Crux) and the associated Two Pointers (Alpha Centauri and Beta Centauri). If they are very close to the horizon you might be very close to the equator.
To confirm these initial observations. Do you recognize any major constellations such as Orion or Scorpio? Do you really know what the Moon looks like - the features on the face of the Moon? Do you know what they look like from were you normally live?
Can you see either in the sky now. Do they look the same? If yes you are in the same hemisphere you normally live in. If they look strange - upside down. You are in the hemisphere opposite to where you normally live.
You've just spent the rest of the night looking at the sky and the Sun is up. Observe the path Sun, in the sky, during the course of the day. If it is low, it winter. If it is high, it's summer. The daytime temperature will also confirm this.