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Which planet has the highest average surface temperature in the solar system?

AstronomyPlanets

Quick Answer

Venus has the highest average surface temperature, about 465°C (869°F), even hotter than Mercury. Its dense carbon-dioxide atmosphere creates an extreme greenhouse effect.

The Full Story

Venus is the hottest planet in the solar system by average surface temperature, with conditions around 465°C (869°F). Mercury is closer to the Sun, but it lacks a thick atmosphere to trap heat, so its temperature swings are much larger. Venus’s atmosphere is about 96.5% carbon dioxide, with clouds of sulfuric acid high above the surface. The runaway greenhouse effect made Venus a textbook example of how atmospheric composition can transform a planet’s climate.

Key Facts

1.Average surface temperature on Venus is about 465°C
2.Venus’s atmosphere is about 96.5% carbon dioxide
3.Mercury’s daytime surface can be hotter in some places, but its average is lower

YouTube Angle

Suggested video title for this topic:

"The planet that’s hotter than Mercury — and why"

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