what pads? it may or may not be normal. normally it is, as certain, even street friendly pads will make noise until the pads themselves are hot, and that doesnt necessarily mean baking in the sun hot, it could mean much more pending the pad and the heat range for it. it looks like you have plenty of pad left. so i'd guess when they make noise, if you were to get on the brakes a few time that noise would either fade or go away completely. and if the brakes cool down enough aka sitting still or driving down a highway not using the brakes for a while, it'll come back.