Amazingly, our pond temperature is already up to 54°F! Looks like the weather is going to cool down a bit over the next three days, but I'm pretty comfortable the water temperature in the pond will stay above 50°F and then start warming up pretty dramatically.
I have two groups of black banded sunfish I got from Frank last fall. One group is in the pond and spent all winter in there, but the other group has been in an aquarium in my fishroom. It may be time to add the second group to the pond, or perhaps hold back a pair in the aquarium to see if I can get them to spawn.
Also, some Asian fish, like Badis ruber, are pretty comfortable with temperatures down to 60°F, so I need to start thinking about which non-native fish to move in the pond.