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Planet Jupiter
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What is the weather like on Jupiter?

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November 17, 2015 2:11AM

Because there is no clearly marked boundary between Jupiter's surface and its atmosphere, there is no actual "weather" or Jupiter. There are, however, weather-like changes within its dense atmosphere, including pressure differences, winds, storms, and precipitation of liquids and solids. Jupiter's extremely dense and relatively dry atmosphere is composed of a mixture of hydrogen, helium and much smaller amounts of methane and ammonia.

The planet is basically a turbulent, stormy, whirlpool of wind, banded with variable belts and a giant "Red Spot." This giant Red Spot is an oval shaped, counter-clockwise moving storm and is four times larger than our Earth. The storm is by far the largest of similar ovals found on other parts of Jupiter and the other gas giants. Jupiter's wind appears to be driven by internal heat rather than from solar insolation. A probe dropped by the Galileo spacecraft late in 1995 provided evidence of wind speeds of more than 400 mph and some lightning.

The clouds are likely made of ammonia ice crystals, changing to ammonia droplets further down. It is estimated that the temperature of the cloud tops are about -280 degrees F. Overall, Jupiter's average temperature is -238 degrees F. Since Jupiter is only tilted slightly more then 3 degrees on its axis, seasonal fluctuations are minimal.

Jupiter's rocky core lies well below the "surface" and is very hot (around 36,000 degrees F) due to gravitational compression (compression is a heating process).
hot when im there