Got a surprise Wed morning when I looked at one of my hives, my phone was showing temp of 3c,(37f) thermometer near the house 5c (41f) and I had a steady stream of bees coming and going from the hive. Over night temp had dropped to freezing point, this was 2 hours after sunrise. The hive is positioned so it gets sun as soon as it rises obviously the temp in direct sunlight felt much warmer but the air temp was still quite low.