Morning hikes on Mars ☄️ Did you know that it's actually really cold on The "Red Planet"? The average temperature on Mars is minus 80°F (-27°C) – way below freezing! Mars has about one-third the gravity of Earth. A rock dropped on Mars would fall slower than a rock dropped on Earth. Things weigh less on Mars than they weigh on Earth. A person who weighs 100 pounds on Earth would only weigh about 37 pounds on Mars because of less gravity. Imagine the adventure to go there!