Weather in San Jose in December 2024
Average weather
Average temperature in San Jose in December
The expected average maximum temperature in December is +77°F with a maximum of +82°F and a minimum of +61°F.
The average maximum temperature goes down 8% by the end of the month, compared with the beginning of the month, from +79°F to +77°F.
Is San Jose warm or cold in December?
San Jose is typically warm in December.
Maximum temperatures go up compared to the previous month from +75°F to +75°F. The minimum temperature also goes up from +63°F to +63°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how December is compared to other months in San Jose:
Water temperature in San Jose in December
Water in San Jose in December is Very warm. It varies from +80°F to +85°F, with an average of +83°F. Note that the air temperature is lower than the water temperature, averaging around +75°F.
In December, water temperatures are average relative to the rest of the year:
Can you swim in San Jose in December?
Climate in San Jose in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +75°F | +75°F | +75°F | ||||
| Min. temperature | ||||||
| +57°F | +55°F | +55°F | ||||
| Max. temperature | ||||||
| +84°F | +82°F | +84°F | ||||
| Rainfall | ||||||
| 485 mm | 266 mm | 136 mm | ||||
| Wind | ||||||
| 2 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +82°F | +83°F | +82°F | ||||
| Humidity | ||||||
| 81% | 75% | 70% | ||||
| Air pressure | ||||||
| 1014 HPa | 1014 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 0 | 1 | 2 | ||||
| Cloudy days | ||||||
| 0 | 0 | 1 | ||||
| Rainy days | ||||||
| 26 | 29 | 28 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December weather is still as ok as in November. The temperature levels stay the same in the area of +75°F for average maximum temperature during the day. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 485 mm to 266 mm. It feels drier, as humidity decreases from 81% to 75%. Winds are stronger in comparison to November, going up from 2 m/s to 4 m/s on average. The good news is there are likely to be more sunny days in December, from 0 to 1.
But maybe it is worth considering traveling in January as the weather gets better.
Wind
The average wind speed is 5 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in San Jose is gradually decreasing during December, going from 6 m/s to 5 m/s over the course of the month.
Rain
How was the weather last December in San Jose?
Climate Change Over the Years
The climate in San Jose in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1999 (+74°F) and the highest in 2013 (+79°F). The driest year was 2023 with only 3365 mm of rainfall, and the wettest year was 1995 with 7044 mm.
FAQ
Is December a good time to visit San Jose?
Can you sunbathe in San Jose in December?
Can you swim in San Jose in December?
Is San Jose rainy in December?
Is it sunny in San Jose in December?
Monthly weather in San Jose
Source of the data
For this page, we’ve looked at the typical weather in San Jose, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.