San Jose Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in San Jose, California during each month of the year.

The average high and low temperatures are listed below for the city, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 70, 80 or 90 °F monthly and annually in San Jose, scroll down farther. There are also counts of nights with cold weather.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for San Jose, 2010 to 2019
High °F Low °F   High °C Low °C
61 43 January 16 6
63 44 February 17 7
67 47 March 19 8
70 49 April 21 10
73 52 May 23 11
79 56 June 26 13
81 58 July 27 15
81 59 August 27 15
81 58 September 27 14
76 53 October 25 12
67 46 November 19 8
60 42 December 16 6
72 51 Year 22 10
30-year temperature averages for San Jose, 1991 to 2020
High °F Low °F   High °C Low °C
60 42 January 15 5
62 44 February 17 7
66 46 March 19 8
69 48 April 21 9
74 52 May 23 11
79 56 June 26 13
81 58 July 27 15
81 59 August 27 15
81 57 September 27 14
76 53 October 24 12
66 46 November 19 8
60 42 December 15 5
71 50 Year 22 10

Days of Hot Weather in San Jose

San Jose averages 16 days a year of 90-degree weather, scattered from as early as April to as late as October.

The city typically sees just one day annually when the temperature reaches 100 degrees Fahrenheit (38 °C) or more. A day that hot can happen anytime from June to September.

Days per month in San Jose of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 1 0 0
February 4 0 0
March 9 1 0
April 12 3 0
May 21 6 1
June 29 12 3
July 31 17 3
August 31 17 3
September 29 14 5
October 24 9 1
November 8 1 0
December 1 0 0
Year 199 80 16

How Often San Jose Has Cold Temperatures

Lows in the 30s Fahrenheit are about as cold as it ever gets at San Jose. The city sees just three nights a winter when the temperature cools down to freezing.

Days per month on average in San Jose when the minimum temperature drops to 32 or 40 °F or below
  32 °F
0 °C
40 °F
4 °C
January 1 13
February 0 9
March 0 4
April 0 1
May 0 0
June 0 0
July 0 0
August 0 0
September 0 0
October 0 0
November 0 5
December 1 14
Year 3 46
References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

California Temperatures
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