Honey bees can withstand a relatively wide range of temperatures to maintain the brood nest — that is, the core of the hive that houses the queen, eggs and young bees. Honey bees generally fly at temperatures between 50 and 104 degrees Fahrenheit. When it’s hotter, they transition from nectar collection to water retrieval used to cool the hive. At about 118 degrees, they start to lose key functions. So, how can beekeepers protect their colonies in hot weather?
The first thing is to keep water sources close to the hives, starting in the spring when bees first start flying. Colonies also need plenty of space, which may mean adding boxes above the brood nest. In addition, nothing should obstruct the entrances to hives. It’s also important to read pesticide labels, noting any temperature restrictions.