The highest day temperature in January 2026 was 84°F. The lowest night temperature was 82°F. The average values for day and night temperatures during January were 83.6°F и 83.0°F respectivly.

The average sea surface temperature in January 2026 for San Luis was 85.6°F. The maximum and minimum values were 85.2°F and 86.0°F respectively.

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

Precipitation total in January for San Luis is 0.9 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 17.7 mph. It makes January the most windy month 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 January is 4.1 hours.