San Jose in September
Find out everything about the water temperature in San Jose in September. Average, minimum and maximum recorded temperatures as well as daily temperature in September for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in September
Minimum:
57.2 °F
Average:
64.5 °F
Maximum:
73.7 °F
Sea water temperature in San Jose in September
In the city of San Jose, the month of September is somewhat too cool for swimming. The minimum recorded temperature during this month was 57.2°F on September 14, 2016, with an average temperature being 64.5°F and a maximum temperature reaching 73.7°F on September 9, 2022.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Sep 1 | 64.4°F | 69.8°F | 70.8°F |
| Sep 2 | 64.4°F | 70.1°F | 70.1°F |
| Sep 3 | 64.5°F | 68.8°F | 70.1°F |
| Sep 4 | 64.7°F | 68.3°F | 69.6°F |
| Sep 5 | 64.9°F | 69.2°F | 69.9°F |
| Sep 6 | 65.2°F | 69.9°F | 70.9°F |
| Sep 7 | 65.1°F | 71.1°F | 69.5°F |
| Sep 8 | 64.9°F | 70.1°F | 69.2°F |
| Sep 9 | 65.0°F | 69.7°F | 69.4°F |
| Sep 10 | 64.8°F | 69.5°F | 68.9°F |
| Sep 11 | 64.6°F | 69.4°F | 70.3°F |
| Sep 12 | 64.1°F | 69.4°F | 69.4°F |
| Sep 13 | 63.9°F | 67.7°F | 69.8°F |
| Sep 14 | 64.1°F | 68.6°F | 70.1°F |
| Sep 15 | 64.5°F | 70.8°F | 69.9°F |
| Sep 16 | 64.5°F | 69.9°F | 68.2°F |
| Sep 17 | 64.3°F | 68.9°F | 67.8°F |
| Sep 18 | 64.5°F | 67.4°F | 67.7°F |
| Sep 19 | 64.3°F | 66.7°F | 66.5°F |
| Sep 20 | 64.2°F | 66.4°F | 66.0°F |
| Sep 21 | 64.0°F | 67.0°F | 65.2°F |
| Sep 22 | 64.1°F | 66.1°F | 66.2°F |
| Sep 23 | 64.1°F | 65.3°F | 66.3°F |
| Sep 24 | 64.1°F | 65.5°F | 66.9°F |
| Sep 25 | 64.5°F | 66.3°F | 68.5°F |
| Sep 26 | 64.5°F | 66.8°F | 67.4°F |
| Sep 27 | 64.7°F | 67.9°F | 67.2°F |
| Sep 28 | 64.5°F | 67.6°F | 68.8°F |
| Sep 29 | 64.4°F | 70.2°F | 68.5°F |
| Sep 30 | 63.9°F | 69.6°F | 68.5°F |
In an average year, San Jose offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in San Jose was recorded on October 7, 2024, reaching a 73.9°F. While the coldest temperature occurred on February 9, 2023, dipping to 50.8°F. The average readings by season are 54.0°F in Winter, 57.6°F in Spring, 63.3°F in Summer, and 61.8°F in Autumn.
In September, the temperature is higher than August's average of 64.1°F and October's average of 62.5°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Redwood City |
55.5°F
|
21mi |
| Oakland |
54.3°F
|
38mi |
| San Francisco |
53.4°F
|
42mi |
| Monterey |
53.5°F
|
51mi |
* current water temperature in this city
** straight line distance from San Jose