Darker blue is better on every row except temperature. Darkness is calculated in the browser from low-precision Sun and Moon positions (accurate to about a degree, so times are ±10 minutes); white means the Sun is above −6°. Transparency is a rough proxy from surface humidity and visibility, not column water vapour. There is no seeing row: Open-Meteo has no seeing forecast. Weather data from Open-Meteo (CC BY 4.0).