Astronomers using NASA's Spitzer Space Telescope are making weather maps of an exotic class of exoplanets called "hot Jupiters." What they're finding is wilder than anything we experience here in our own solar system.
Strange weather on 'hot Jupiters' explained
Many of the roughly 300 extrasolar planets discovered so far are called "hot Jupiters" because they are large gas giants like our own Jupiter. Often, these planets orbit much closer to their stars than Jupiter does to the sun, so their daylight temperatures can reach 3,000 degrees Fahrenheit (1,600 degrees Celsius)— much hotter than any planet in our solar system.
While many extrasolar planets are too far away to detect anything at all about their weather, for a few planets scientists have been able to infer temperature changes from the varying brightness of the planet as it rotates relative to the Earth.
Source: Strange weather on 'hot Jupiters' explained - Technology & science - Space - Space.com | NBC News