condition mean min max 4 h after light 29.09065 27.5711 30.6102 8 h after light 27.3187 26.4476 28.1898 12 h after light 25.01245 23.4242 26.6007 4 h after dark 31.43305 31.0191 31.847 8 h after dark 29.9026 29.5998 30.2054 12 h after dark 32.062749999999994 31.906 32.2195