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 1981 to 2010 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, 1981 to 2010
High °F Low °F   High °C Low °C
58 42 January 15 6
62 45 February 17 7
66 47 March 19 8
69 49 April 21 9
74 52 May 24 11
79 56 June 26 13
82 58 July 28 15
82 58 August 28 15
80 57 September 27 14
74 53 October 23 11
64 46 November 18 8
58 42 December 14 6
71 50 Year 22 10

Days of Hot Weather in San Jose

San Jose doesn't get many really hot days a year. But a day of 90-degree weather can show up as early as April or as late as October.

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

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 0 0 0
February 3 0 0
March 3 1 0
April 12 3 1
May 21 7 1
June 27 12 3
July 31 18 4
August 31 18 4
September 29 13 3
October 21 6 1
November 5 0 0
December 0 0 0
Year 189 78 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 12
February 0 6
March 0 3
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 2 13
Year 3 40
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. 1981-2010 U.S. Climate Normals. (Data Access. FTP.)

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