The highest day temperature in December 2023 was 86°F. The lowest night temperature was 84°F. The average values for day and night temperatures during December were 85.6°F и 85.2°F respectivly.

The average sea surface temperature in December 2023 for San Luis was 87.9°F. The maximum and minimum values were 86.8°F and 88.8°F respectively.

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

Precipitation total in December for San Luis is 1.5 in.

The average wind speed in December is 17.1 mph. It makes December one of the most windy months of the year for San Luis.

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 in December is 3.8 hours.