Since we have the temperature system, would be nice to put it to good use along with the different types of clothing. Have us get ready for the winter or the wet seasons. Even in the desert it can get very cold very fast and so much rain that it floods.
Heck yeah, also add phases of the moon and longer/shorter days for time progression.
I could go for electrical storms in the desert, or even rain after sandstorms
Both are actually very common occurrences in desert climate.