At what temperature do bees begin to visibly cluster?

Bees typically begin to cluster when temperatures drop to around 57 degrees Fahrenheit. Clustering is a vital behavior for honey bees as it helps them maintain warmth during cooler weather. When the temperature declines, bees will gather tightly together in a ball within the hive, generating heat through their collective body warmth. This behavior is crucial for their survival, particularly in colder months when they may need to maintain a suitable internal temperature for the queen and brood.

While bees can be active at slightly lower temperatures, clustering behavior specifically becomes observable around the 57-degree mark. This temperature indicates when bees start to prioritize thermoregulation over foraging and other activities, reflecting their instinctual adaptation to environmental conditions.