[GCA10]

Broadly yes. It's why deserts have such extreme temperature fluctuations between day and night. No clouds are part of the reason, as well as very little humidity to serve the same heat-retaining/heat-reflecting role.

On my first time in the Nevada desert I was astonished to find that I needed a jacket at dawn to stay warm, after all kinds of daytime heat. Looking at Elko NV's weather this week, it's got highs of 99F/37C and overnight lows of 61F/16C

[swores]

37C high earlier today and 16C low later tonight are coincidentally the exact numbers for my city in the UK. Which isn't of course anything like a desert, though the whole country is in the middle of a heatwave (and last night didn't drop below 20c).