The space over my garage is dominated by a large dormer, which I use as my office. On either side of this dormer, the remainder of the over-garage area is attic space. We have access panels into these attic spaces.
I'm thinking of using that space as a networking closet, as it's easy for me to get cables to the basement and up into the main attic from there, which gives me the ability to drop cables down to all of the other bedrooms.
My concern is temperature. This is the front of the house, and the slope of the the roof of this space goes all the way up to the attic (which does have a ridge vent), but it's broken by an interior wall, kind of like this:
Here's a picture of the front of the house, for reference:
I haven't measured temperature in there on a hot summer day, but as it's uninsulated and effectively not vented I assume it gets fairly toasty in there.
Is there any way to keep it cool(ish?) I'd love to keep it under 85F, but I'd settle for keeping it with 5 degrees F of the external temperature.