At what temps do you expect various behavior?

I know that around 50F you can expect them to start flying more, taking feed from feeders that are outside the hive or above etc. However I'm also assuming they behave slightly differently below those temps.

IOW if you're looking at temps of 0F they are probably going to cluster tightly and abandon brood to far from the cluster etc, so opening up the brood nest when you're still likely to see those temps would be bad. But I've not read anything that gives an idea what those temps might be.

Just asking because of this insane weather. Weeks of above 70's, populations exploding and hives running out of room. Then days of lows in the 30's...we're supposed to see 80 again in a couple days, then a week of colder weather.

~Matt