condition mean min max 4 h after light 497.6 497.6 497.6 8 h after light 562.75 539.6 585.9 12 h after light 573.0 487.0 659.0 4 h after dark 619.8 456.5 783.1 8 h after dark 600.6 476.6 724.6 12 h after dark 553.25 417.4 689.1