Travis,
I don't know where you live,
Mid-Missouri. We have all four seasons here. Sometimes in the same day.
but I believe that the black shingles also help to warm the house in the winter months for those who live at higher latitudes. Maybe a local builder could advise you on that.
I live in the tropics, and can be considered almost fanatical about keeping heat out, so I have white aluminium shingles put down on a reflective "Peel and Seal" coating.
If your black shingles are an advantage to you in the winter months, then another option would be to vent your roof in the summer months, but have it on a switch that you can turn off to keep it warm and cozy up there in the winter.
I don't think they're much of an advantage in the winter. As part of our off-grid home plan, we'll be switching from electric home heat to wood burning stove. We'll keep the electric elements in the water heater and HVAC only as a backup. We can take the home heat off the electrical load, but we can't do that with the A/C in the summer. Evaporative cooling doesn't work in my area, since Missouri summers tend to be more
humid than just hot.
I did find that the local Lowes has this reflective roof coating. I picked up a 1 gal. bucket, and applied it to the roof. At 83°F outside temp, and 125°F shingle temp, the coating on the roof was only 85°F !! From 125 to 85 is a pretty huge difference, so I'm going to coat more of the south-facing roof. Before I do, I'll take temp readings from the ceiling (gotta love my IR tire pyrometer) of all the rooms. The idea would be that for the thermostat set at, say 80°, the ceilings, especially in rooms further from the HVAC blower, should be cooler after application.
I'll know by week's end. It looks like tomorrow thru thursday should be rain-free, so I'm going to run to the hardware store and pick up more of the roof coating today!