Weather in San Jose Today
Current temperature in San Jose: 29°C (84°F). Sunny. Today's high 37°C (99°F), low 20°C (68°F).
Today's Daylight Forecast
Moon & Islamic Calendar
High UV apply sunscreen before heading out. A hat or sun umbrella is recommended during peak hours.
5-Day Weather Forecast
Full 15-Day ForecastAtmospheric Details
Today vs Normal
The long-term average high for today is 30°C.
9 of the last 19 days with published data ran above normal.
That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.
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.
Health & Activity Advice
UV index is 7 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.
Nearby Regional Outlook
San Jose Weather Radar
Live precipitation · Cloud cover · Wind
Frequently Asked Questions
What is the hottest month in San Jose?
The hottest month in San Jose is typically August, with daytime highs averaging around 29.1°C (84°F), based on 10 years of historical weather data. Overnight lows during this period average near 15.4°C (60°F).
What is the coldest month in San Jose?
The coldest month in San Jose is typically February, with overnight lows averaging around 6.4°C (44°F) and daytime highs near 16.4°C (62°F), based on 10 years of historical weather data.
When does the rainy season start in San Jose?
San Jose has a clearly defined rainy season running roughly from January, March, December, based on 10 years of historical rainfall data. January is typically the wettest month, averaging about 116 mm of rain. Outside this window, rainfall is much lighter for the rest of the year.
What's the best time of year to visit San Jose?
The best time to visit San Jose is typically May to June, when daytime highs average a comfortable 25.9°C (79°F). Rainfall during this window averages around 8 mm, well below the 116 mm seen in January, the wettest month. This is based on 10 years of historical weather data.
Is San Jose's air quality safe right now?
As of the latest reading, San Jose's air quality index (AQI) is 42, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.