The hottest planet in our solar system is Venus. Despite being the second planet from the Sun, Venus has an average surface temperature of approximately 864 degrees Fahrenheit (462 degrees Celsius), which is hot enough to melt lead. This extreme heat is primarily due to its thick atmosphere, composed of 96% carbon dioxide, which creates a runaway greenhouse effect that traps heat [1][3][6].

In contrast, Mercury, the closest planet to the Sun, is not the hottest, as it lacks a significant atmosphere to retain heat, leading to drastic temperature fluctuations [1][2]. While Mercury can reach daytime temperatures of 800 degrees Fahrenheit (430 degrees Celsius), its nighttime temperatures can plummet to minus 290 degrees Fahrenheit (minus 180 degrees Celsius) [5].

The Hottest And Coldest Planets Of Our Solar System

What is the hottest planet in our solar system?

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