San Jose air quality · California, United States
Healthy air supports better stamina during outdoor workouts
US AQI 48 (Good) in San Jose, from 1 AirNow monitoring station. Main pollutant: PM2.5.
Updated
Pollutants in San Jose
- PM2.548AQI
- Ozone26AQI
- NO₂8AQI
US values are per-pollutant AQI from the highest-reading monitor near San Jose (San Jose - Jackson St.).
Is it safe outside in San Jose right now?
Air quality is satisfactory and poses little or no risk.
Walking and commuting
Go aheadEnjoy it.
Running and jogging
Go aheadA great time to run outdoors.
Cycling
Go aheadRide freely.
Children playing outside
Go aheadNo limits.
Older adults and heart or lung conditions
Go aheadNo limits.
Open windows
Go aheadAir out your home.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededNot needed.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
What US AQI 0–50 means for your health →
San Jose air quality history
Daily average, 36 days- 53average daily US AQI over 36 days
- 81worst day, 4 October
- 28cleanest day, 22 September
- 0days at Unhealthy or worse
The last 7 days averaged 54, about the same as the week before (52). 16 of the last 36 days were Good.
Weather in San Jose
No active National Weather Service alerts for San Jose.
| Day | Forecast | High | Low | Rain |
|---|---|---|---|---|
| Mon 19 | Partly Sunny | 70°F | 46°F | 8% |
| Tue 20 | Areas Of Fog then Slight Chance Rain Showers | 72°F | 50°F | 72% |
| Wed 21 | Rain Showers | 70°F | 48°F | 76% |
| Thu 22 | Areas Of Fog | 68°F | 46°F | 24% |
| Fri 23 | Patchy Fog then Sunny | 72°F | 46°F | 1% |
| Sat 24 | Patchy Fog then Sunny | 73°F | 48°F | 17% |
| Sun 25 | Slight Chance Light Rain | 72°F | 46°F | 20% |
National Weather Service forecast. All US weather alerts →
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San Jose air quality: common questions
What is the AQI in San Jose right now?
The US AQI in San Jose is 48 (Good). The main pollutant is PM2.5.
Is it safe to go outside in San Jose today?
A great time to be outside. Air quality is satisfactory and poses little or no risk. For runners: A great time to run outdoors.
How has air quality in San Jose been recently?
Over the last 36 days with data, San Jose averaged US AQI 53. The worst day was 4 October at 81; the cleanest was 22 September at 28. 0 days were at Unhealthy or worse.
Where does San Jose's air quality data come from?
From US EPA AirNow, using 1 monitoring station in and around the city. Good Air does not estimate or adjust these readings.
Source: US EPA AirNow. Readings are published by the monitoring agency and may be revised.