Weather in San Jose in January 2025
- January is usually the coldest month of the year in San Jose;
Average weather
Average temperature in San Jose in January
The expected average maximum temperature in January is +75°F with a maximum of +79°F and a minimum of +57°F.
The average maximum temperature goes down 8% by the end of the month, compared with the beginning of the month, from +77°F to +75°F.
Is San Jose warm or cold in January?
San Jose is typically warm in January.
Maximum temperatures go up compared to the previous month from +75°F to +75°F. The minimum temperature also goes down from +63°F to +61°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
January is the coldest month in San Jose, here is the comparison with other months:
Water temperature in San Jose in January
Water in San Jose in January is Very warm. It varies from +80°F to +85°F, with an average of +82°F. Note that the air temperature is lower than the water temperature, averaging around +75°F.
The water temperature in January is one of the coldest of the entire year:
Can you swim in San Jose in January?
Climate in San Jose in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +75°F | +75°F | +77°F | ||||
| Min. temperature | ||||||
| +55°F | +55°F | +55°F | ||||
| Max. temperature | ||||||
| +82°F | +84°F | +86°F | ||||
| Rainfall | ||||||
| 266 mm | 136 mm | 83 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 5 m/s | ||||
| Avg. water temperature | ||||||
| +83°F | +82°F | +83°F | ||||
| Humidity | ||||||
| 75% | 70% | 67% | ||||
| Air pressure | ||||||
| 1014 HPa | 1014 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 1 | 2 | 3 | ||||
| Cloudy days | ||||||
| 0 | 1 | 0 | ||||
| Rainy days | ||||||
| 29 | 28 | 25 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
January often has better weather than December. The temperature levels stay the same in the area of +75°F for average maximum temperature during the day. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 266 mm to 136 mm. It feels drier, as humidity decreases from 75% to 70%. The average wind speed doesn’t change much during January, staying around 4 m/s. The good news is there are likely to be more sunny days in January, from 1 to 2.
February brings much the same weather, it remains good.
Wind
The average wind speed is 6 m/s getting up to 9 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 increasing during January, going from 4 m/s to 7 m/s over the course of the month.
Rain
How was the weather last January in San Jose?
Climate Change Over the Years
The climate in San Jose in January 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 January a good time to visit San Jose?
Can you sunbathe in San Jose in January?
Can you swim in San Jose in January?
Is San Jose rainy in January?
Is it sunny in San Jose in January?
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.