Dawn in the Desert

I can always tell when dawn is approaching, even if I don't have the curtains open to look outside. The temperature drops two or three degrees around first light, which indicate the approach of dawn. According to the temperature on my desktop, it is now 48 degrees outside, but when I got online, the temperature was 51 degrees.

Desert temperatures
Drop with the approach of dawn
Morning becomes cold

I'm not sure how high the temperature in Las Vegas will get today. Yesterday we had outdoor temperatures in the 70s, which is nice because you don't need to turn the heat on in the car and a long sleeved shirt or blouse will keep your arms warm when you go outside.