Venus' surface temperature cools off at night, much like Mercury's does.

Question

Quizplus · Accepted Answer

Venus has a thick atmosphere composed mostly of carbon dioxide, with clouds of sulfuric acid, which acts as a blanket, trapping heat through a strong greenhouse effect. This keeps the surface temperature almost constant, around 465°C (869°F), day and night, unlike Mercury, which has minimal atmosphere to retain heat, leading to significant temperature drops at night.

Venus' Surface Temperature Cools Off at Night, Much Like Mercury's