Today in Castle rock, the largely blue sky won.t last.
A few fair-weather cumulus clouds in the morning, some sun but cloud building in the afternoon. Risk of black ice in the afternoon. Light winds.
The reliability of the situation is good.
Temperatures will vary between -22 and -11°C, it will be freezing in the morning.
Tonight, changeable skies becoming less cloudy.
Warning: icy conditions likely. Light winds.