15-Day Weather Forecast - San Jose
15-day weather forecast for San Jose: temperatures from 13°C (55°F) to 37°C (99°F). Average daily high 30°C (86°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
San Jose's 15-day outlook ranges from a low of 13°C to a high of 37°C, with an average daytime high near 31°C. That's 1° above the long-term average high of 30°C for this time of year. Air quality is currently Moderate (AQI 62), driven mainly by PM2.5 at 14 μg/m³.
Today vs Normal
The long-term average high for today is 30°C.
11 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running below normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Extended Outlook for San Jose
Over the next 15 days, San Jose is forecast to see temperatures ranging from 12°C to 38°C, averaging a daily high of 31°C. The extended outlook indicates predominantly dry and clear conditions throughout the period. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.