If you plan to visit San Jose in January, the weather is typically alright, with an average high temperature of +59°F during the day and approximately 6 sunny days. Expect some rainy, though, as there are typically 13 rainy days in the month and around 119 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Good to know:
January is usually the coldest month of the year in San Jose;
January is usually the wettest month of the year in San Jose;
Average weather
☀️
+59°F
Avg. max. temperature
+30°F
Min.
+77°F
Max.
119 mm
Total precipitation
75%
Avg. humidity
1 m/s
Avg. wind
6 ☀️
Sunny Days
12 ⛅️
Cloudy
13 🌦
Rainy
Our opinion: San Jose has OK weather in January.
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Average temperature in San Jose in January
Here are the expected maximum, average and minimum temperatures in San Jose for January based on the historical data.
Last Year
Historical Data
Going from a maximum of +68°F during the day to a minimum of +34°F during the night, the temperature in January averages around +61°F.
The average maximum temperature goes up 5% by the end of the month, compared with the beginning of the month, from +59°F to +61°F.
Is San Jose warm or cold in January?
San Jose is typically mild in January.
Maximum temperatures go up compared to the previous month from +59°F to +59°F. The minimum temperature also goes up from +43°F to +43°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
January is the coldest month in San Jose, here is the comparison with other months:
Climate in San Jose in January
San Jose weather looks like this, on average, in January and the surrounding months.
December
January
February
Avg. temperature
+59°F
+59°F
+63°F
Min. temperature
+23°F
+30°F
+28°F
Max. temperature
+75°F
+77°F
+81°F
Rainfall
108 mm
119 mm
125 mm
Wind
2 m/s
1 m/s
2 m/s
Humidity
73%
75%
72%
Air pressure
1019 HPa
1019 HPa
1017 HPa
Sunny days
6
6
6
Cloudy days
12
12
11
Rainy days
13
13
12
Snowy days
0
0
0
January weather is still as ok as in December.The temperature levels stay the same in the area of +59°F for average maximum temperature during the day.Prepare for more rain. Average rainfall goes from 108 mm to 119 mm.Humidity rises from 73% to 75%.Winds are calmer in comparison to December, going down from 2 m/s to 1 m/s on average.The amount of sunny days stay about the same, averaging 6 sunny days during the month.
But maybe it is worth considering traveling in February as the weather gets better.
Wind speed in San Jose in January based on historical data.
Last Year
Historical Data
The average wind speed is 4 m/s getting up to 7 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 January, going from 5 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during January in San Jose based on historical data.
Last Year
Historical Data
Typically, there is a 84% chance of rain on an average day in January, with total rainfall of approximately 305 mm. The maximum amount of rainfall per day is around 45 mm, which is moderate rain.January is a pretty wet month with over 26 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
January is one of the rainiest months in San Jose, here is a comparison with other months, total mm:
San Jose wettest month is February, where a typical day has a 43% chance of precipitation and 125 mm of rainfall per day. September, on the other hand, is the driest month with a mere 7% chance of precipitation and 6 mm of rainfall per day.
Snow
Amount of snow in mm during January in San Jose based on historical data.
Last Year
Historical Data
Typically, there is a 0% chance of snow on an average day in January, with a total monthly snowfall of approximately 3 mm.
How was the weather last January in San Jose?
This is the weather in San Jose in January 2024:
1 January
🌧️
+60°F
2 January
☀️
+59°F
3 January
☁️
+58°F
4 January
🌧️
+59°F
5 January
🌧️
+60°F
6 January
🌧️
+62°F
7 January
🌧️
+62°F
8 January
🌧️
+62°F
9 January
🌫️
+60°F
10 January
🌧️
+58°F
11 January
🌧️
+55°F
12 January
🌧️
+67°F
13 January
☁️
+64°F
14 January
🌧️
+58°F
15 January
🌧️
+58°F
16 January
🌧️
+53°F
17 January
🌧️
+56°F
18 January
☀️
+57°F
19 January
☁️
+56°F
20 January
☀️
+55°F
21 January
☀️
+56°F
22 January
☁️
+59°F
23 January
☀️
+60°F
24 January
☀️
+64°F
25 January
☀️
+67°F
26 January
☀️
+67°F
27 January
☀️
+66°F
28 January
☀️
+63°F
29 January
🌧️
+59°F
30 January
☀️
+56°F
31 January
☀️
+60°F
In January 2024 San Jose had 12 sunny days, 4 cloudy days, and 14 rainy days. The average maximum temperature was +61°F, with an absolute maximum of +68°F and a minimum of +54°F. The average humidity was 69%, with a maximum of 93% and a minimum of 19%. The average wind speed was 4 m/s, with a maximum of 16 m/s and a minimum of 0 m/s.
Are you planning a trip in January?
Climate Change Over the Years
This is how San Jose climate has changed over the last 43 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 1982 (+67°F) and the highest in 2024 (+75°F). The driest year was 2013 with only 147 mm of rainfall, and the wettest year was 2020 with 4306 mm.
FAQ
Frequently asked questions about the weather in San Jose in January:
Is January a good time to visit San Jose?
It’s always a good time to visit San Jose, but the weather is changeable in January, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in San Jose in January?
January has mild temperatures in San Jose. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is San Jose rainy in January?
San Jose is often rainy in January. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in San Jose in January?
Usually, it’s not very sunny in San Jose in January, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
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.
