The highest day temperature in December 2025 was 79°F. The lowest night temperature was 47°F. The average values for day and night temperatures during December were 72.6°F и 55.5°F respectivly.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for San Luis Rio Colorado is 0.1 in. This value is relatively stable throughout the year.

The average wind speed in December is 6.6 mph. It makes December the most windless month of the year for San Luis Rio Colorado.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Luis Rio Colorado in December is 8.4 hours.