San Diego air quality · California, United States
After rain, readings often drop sharply within an hour
US AQI 99 (Moderate) in San Diego, from 1 AirNow monitoring station. Main pollutant: PM2.5.
Updated
Pollutants in San Diego
- PM2.599AQI
- PM1038AQI
- Ozone23AQI
US values are per-pollutant AQI from the highest-reading monitor near San Diego (San Ysidro).
Is it safe outside in San Diego right now?
Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors.
Walking and commuting
Go aheadFine for everyone.
Running and jogging
Take careFine for most; unusually sensitive people should ease the pace.
Cycling
Go aheadFine for everyone.
Children playing outside
Go aheadNo limits for most children.
Older adults and heart or lung conditions
Take careWatch for symptoms such as coughing or breathlessness.
Open windows
Go aheadFine to ventilate.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededOptional.
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 51–100 means for your health →
San Diego air quality history
Daily average, 36 days- 58average daily US AQI over 36 days
- 83worst day, 3 October
- 40cleanest day, 13 October
- 0days at Unhealthy or worse
The last 7 days averaged 60, about the same as the week before (59). 6 of the last 36 days were Good.
Weather in San Diego
Beach Hazards Statement until Tue 20 Oct, 9:00 PT
| Day | Forecast | High | Low | Rain |
|---|---|---|---|---|
| Mon 19 | Patchy Fog then Sunny | 82°F | 64°F | 1% |
| Tue 20 | Patchy Fog then Mostly Sunny | 79°F | 64°F | 9% |
| Wed 21 | Showers And Thunderstorms Likely | 75°F | 63°F | 80% |
| Thu 22 | Showers And Thunderstorms | 70°F | 59°F | 80% |
| Fri 23 | Mostly Sunny | 72°F | 59°F | 10% |
| Sat 24 | Sunny | 79°F | 63°F | 2% |
| Sun 25 | Mostly Sunny | 79°F | 63°F | 6% |
National Weather Service forecast. All US weather alerts →
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San Diego air quality: common questions
What is the AQI in San Diego right now?
The US AQI in San Diego is 99 (Moderate). The main pollutant is PM2.5.
Is it safe to go outside in San Diego today?
Fine for most people. Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors. For runners: Fine for most; unusually sensitive people should ease the pace.
How has air quality in San Diego been recently?
Over the last 36 days with data, San Diego averaged US AQI 58. The worst day was 3 October at 83; the cleanest was 13 October at 40. 0 days were at Unhealthy or worse.
Where does San Diego'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.