Bees go into their beehive / bee nest even in biomes where it never rains

The bug

When it rains, bees are going back into their hives, which is normal. However, in some biomes, like the savanna biome, it never rains, the sky gets darker but there is no rain falling.

When it is raining, bees in these biomes will also go into their hive and hide from the rain. But at their location, it is not raining.