we had temps in single & double digits for over 2 weeks, then 3 warm days, & now it's back in single & double digits. what has me concerned is that at 60* yesterday after all that cold would produce a lot of condensation & being followed by a fast drop in temps the condensation did not get a chance to evaporate off. hopefully the girls clustered back up before the cold hit. fingers crossed.
during the warm days I went thru all my hives & put a 1" piece of foam insulation under the outer cover. I only had 1 dead-out & 1 hive that looked iffy. all the rest looked really strong. 1 hive had friggin' hive beetles on top of the inner cover.