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Actually, every planet has seasons! They vary depending on the tilt of the planet's axis, and its orbit around the sun. 

Our seasons on Earth come from the fact that we are tilted 23 degrees on our axis. Sometimes the Northern Hemisphere is closer to the sun, which brings us summer, while the south is further away, which gives them winter. When the planet moves along its axis, these two switch, so the seasons change.

Jupiter is a lot less tilted than the Earth is - only 3 degrees! Add that to its very long orbit, and you get seasons that last THREE YEARS. But because of the gases in its atmosphere, there can be different seasons in different spots. Some clouds are freezing, while other ones are comfortably warm.