The sun looks blurry or hazy, or has a halo. Stars twinkle more than usual. Flowers are especially fragrant. Trees show the undersides of their leaves. Birds fly low, or do not fly at all.
Birds are noisier than usual.
Cows huddle in the field and turn their tails toward the coming storm. Bees stay close to the hive and will not swarm. Insects bite more, and the bites itch more. Snakes are more exposed, less hidden than usual. Stone walls feel damp.