Here's a breakdown of the average surface temperatures for the inner planets:

* Mercury: Daytime: 430°C (800°F) / Nighttime: -180°C (-290°F)

* Venus: 464°C (867°F)

* Earth: 14°C (57°F)

* Mars: -63°C (-81°F)

Key Points:

* Extreme Temperature Differences: Mercury experiences massive temperature swings due to its lack of an atmosphere to retain heat.

* Greenhouse Effect on Venus: Venus has a runaway greenhouse effect, trapping heat from the Sun and making it the hottest planet in our solar system.

* Earth's Moderate Temperatures: Earth's atmosphere and oceans help regulate temperatures, making it habitable.

* Cold and Thin Atmosphere on Mars: Mars has a thin atmosphere, leading to cold temperatures and a wide range depending on time of day and location.

Let me know if you'd like more details about the factors that contribute to these temperatures!