I have some old Giro Blaze gloves, before they started adding padding, that I use for this purpose. Good enough for down into the mid-40šs (F) on bike or around the freezing point off bike. When it gets up into the 50's I switch to Giro DND's.
I've also found that light/mid weight cross country skiing gloves make excellent cycling gloves if you're looking for something unpadded. I ride road, but I hate padded gloves, so I frequently look at ski and mountain bike gloves to see what might work better.