"...but the histogram seems to be consistently overexposing the image with many blown highlights."
Maybe I'm misreading your statement, but I just want to make sure: The histogram does not ever determine exposure, it merely reports the quantity of pixels in each of the brightness values in an already exposed image. You must manually adjust the exposure to cause the histogram to shift either left or right by using exposure compensation or full manual exposure mode. If the histogram is consistently reporting overexposure or blown highlights then you need to adjust the exposure downward with a smaller aperture, higher shutter speed or lower ISO to better suit your needs.
Can you give us a better idea how you have been attempting to employ the histogram?