Mercury is a planet, and it doesn't have a single "temperature" like the Earth does. It has extreme temperature variations depending on:

* Location: The sun-facing side experiences scorching heat, while the side facing away from the sun is incredibly cold.

* Time of day: Temperatures fluctuate drastically between day and night.

Here's a breakdown of Mercury's temperature extremes:

* Daytime on the sun-facing side: Can reach up to 800°F (427°C).

* Nighttime on the side facing away from the sun: Can drop as low as -290°F (-179°C).

Therefore, it's impossible to give a single temperature for Mercury. Instead, we talk about its temperature ranges, which are the most extreme in our solar system!