Ideal temperature for Cories?

I have no idea what the "ideal" temp is but I have 4 bolivian rams and a whole mess of different corydoras in my tank at 79. The rams are comfortable and the cory cats don't seem to care about the temp at all.

My corries seem to be doing just fine at 81. I have 3 x Julii (showing noticable growth already) and 2 x Sterbae. All eating like pigs and constantly on the move.
http://www.planetcatfish.com/catelog/numbers/1.php
Pick your corries out of the list and each species page has ideal temp requirements.

I keep my tank currently at 68F as my cories are in with white clouds. The temp will climb as high as 72F or so. I can't tell you if this is ideal but my cories are close to 4 years old and have bred many times, twice successfully. I have 1 albino bronze, 1 adult male bronze, 5 juvie bronze and 1 peppered. The aquarium is also heavily planted and gets a weekly 30% water change.

hmm

everything I have read says that most cats prefer a range from 76-84. That is about what the temps average out to.

But saying that, I know a guy who keeps cats in his goldfish pond.

Cories seem able to adapt fairly well to a wide range of temps. Since most tropicals seem to like the 76-80F range then that is probably fine.