temperature in san jose california.
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 Â°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 Â°F.