Here is an image of Landsat-8 data of Cleveland collected on July 20, 2014 at 8:53 UTC. The shortwave-infrared (SWIR) data is in color, and shows elevated temperatures in the summit crater. The hottest pixel is about 300 degrees C. The SWIRR data is overlain on thermal infrared data (in shades of grey: white is cold, black is hot), which shows low clouds obscuring the lower portion of the cone, and warm ground (black) around the crater. Note that the hottest region (shown in color) occupies a small portion of the summit crater.
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
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