condition mean min max 4 h after light 7.1 7.1 7.1 8 h after light 34.95 31.0 38.9 12 h after light 37.3 32.6 42.0 4 h after dark 42.9 34.3 51.5 8 h after dark 33.0 9.1 56.9 12 h after dark 19.15 7.8 30.5