The highest day temperature in January 2024 was 105°F. The lowest night temperature was 70°F. The average values for day and night temperatures during January were 95.2°F и 79.3°F respectivly.

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

Precipitation total in January for San Juan is 0.2 in. This value is relatively stable throughout the year.

The average wind speed in January is 9.1 mph. It makes January one of the most windy months of the year for San Juan.

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 Juan in January is 10.2 hours.