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.
| 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 |
| 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.
| 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.
| 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.