The highest day temperature in January 2025 was 92°F. The lowest night temperature was 74°F. The average values for day and night temperatures during January were 88.6°F и 77.0°F respectivly.

The average sea surface temperature in January 2025 for Port of San Jose was 86.3°F. The maximum and minimum values were 85.4°F and 87.4°F respectively.

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

Precipitation total in January for Port of San Jose is 0.0 in. It makes january the least rainy month of the year.

The average wind speed in January is 5.8 mph. This value is relatively stable throughout the year.

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 Port of San Jose in January is 9.4 hours.