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San Jose weather in January

Weather in San Jose: January


	Average day temperature:	57.8°F
	Average night temperature:	45.0°F

	Sea water temperature:	52.8°F

	Number of sunny days:	16 days
	Day length:	9.6 - 10.3 hours

	Number of rainy days:	3 days
	Precipitation totals:	2.0 in.

more information

14 days
forecast

San Jose

sea water
temperature

San Jose

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2025

2024

2023

Day temperature

Night temperature

The highest day temperature during January of 2025 was 68°F. At the same time the lowest night temperature was 38°F. Daily and nightly averages during January were 58.3°F and 44.9°F.

Show year:

2025

2024

2023

The average sea water temperature in January of 2025 was 52.5°F. The highest and lowest sea temperatures during the month were 54.9°F and 50.5°F.

	Sunny days
	Partly cloudy days
	Cloudy days

39%

26%

35%

Number of sunny, partly cloudy and cloudy days in January is almost equal.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

0.5

0.9

1.4

1.8

2.3

2.7

3.2

1.1

1.7

1.6

1.1

1.7

1.6

2.7

Precipitation total value in San Jose in January is 2.7 in. Other months of the year show relatively similar values.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

0.9

1.9

2.8

3.7

4.6

5.6

6.5

4.0

3.9

4.2

4.4

4.5

4.7

5.4

5.3

5.2

4.0

3.9

4.2

4.4

4.5

4.7

5.4

5.3

5.2

4.6

The average wind speed value in January is 4.6 mph

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

2.2

4.4

6.7

8.9

11.1

13.3

15.6

4.6

6.8

8.6

10.1

12.6

13.0

12.8

12.1

9.9

6.3

6.4

4.6

6.8

8.6

10.1

12.6

13.0

12.8

12.1

9.9

6.3

6.4

6.1

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in January is: 6.1.