This is a graph of internal hive temperatures. They are from two hives from Warner Nature Center from Marine Minnesota. Graph by Paul Liedel.
This is a new updated graph.
The outdoor temperatures can do a wide swing of daily temperatures. Where the hives internal temperatures are more steady. It is interesting to note that the internal temperatures are not that far from daily outside temperature highs for the day. It is clear that opening a hive during the day at the high daily temperature does not impact internal hive temperatures.
The temperature sensors are located in the hive at the moment away from the cluster of bees. As the cluster moves closer to the sensors the temperatures will rise on the graph. The temperature in the center of the cluster is in the 80's right now. When brood is present in February the core temperature around the brood will be in the 90's.
