condition mean min max 4 h after light 318.0 318.0 318.0 8 h after light 307.25 277.4 337.1 12 h after light 256.9 196.0 317.8 4 h after dark 243.0 183.7 302.3 8 h after dark 276.0 202.5 349.5 12 h after dark 253.35 213.7 293.0