At least into the 60s, probably higher than that for video.
My CPU gets into the low 60s under a heavy load and above 70 under a burn test, but I don't worry about it at all. As I recall, current Intel CPUs don't throttle themselves until close to 100. So you have a lot of leeway.
Hard drives rarely get above the low 40s.
You should have some idea of normal ranges on your PC. The temperature of your room matters a lot--if temps are 10 degrees higher in summer, you may notice nearly that much of a rise in CPU temps.
Make sure your fans are always spinning. You can monitor their speeds with any good hardware monitoring tool.
You should be able to force temps higher with an app such as Prime 95--just to give you an idea of how each component will move up when highly stressed.