The highest day temperature in May 2026 was 89°F. The lowest night temperature was 50°F. The average values for day and night temperatures during May were 74.9°F и 54.7°F respectivly.

The average sea surface temperature in May 2026 for San Jose was 66.2°F. The maximum and minimum values were 63.4°F and 69.0°F respectively.

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

Precipitation total in May for San Jose is 0.3 in.

The average wind speed in May is 6.3 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 San Jose in May is 11.3 hours.