In the desert you get a clear day every day. Here all of the clouds stop at the shoreline. This is a pattern seen with many coastal deserts. The lack of blue lakes and active rivers with their borders of green vegetation also show an area with little active water. The many sharp features indicate a mountainous region.
Mountains tend to be dryer and cooler than lowlands.
Rare summer showers may happen near the mountains but the desert plateau itself may receive no rain for decades at a time. The only significant vegetation occurs at the scattered oases or at places with artificial irrigation. A dry land with almost no plants. Snow capped mountains and dry clear air with only an occasional cloud.