Which planet has the strongest winds?

Neptune has the strongest winds in the Solar System. Winds whip clouds of frozen methane across the planet at speeds of more than 1,200 miles per hour (2,000 kilometers per hour). This is close to the top speed of a U.S. Navy F/A-18 Hornet fighter jet! The most powerful winds on Earth reach only about 250 miles per hour (400 kilometers per hour).