Boulder WeatherThursday 12/18 0%Partly CloudySun and clouds mixed. High 43F. Winds light and variable.Friday 12/19 0%ClearSunny. High 42F. Winds W at 5 to 10 mph.Saturday 12/20 0%Partly CloudyCloudy skies early will become partly cloudy later in the day. High around 45F. Winds light and variable.