The inland setting means local environmental conditions are shaped more by urban density than coastal influences.
Air quality is typical for San Francisco
24-Hour AQI Trend
Pollutant Breakdown
Peer Comparison
Air quality is typical for San Francisco
Why San Francisco's Air Is What It Is
San Francisco sits in an inland urban setting where local environmental conditions are shaped primarily by density and development patterns. Temperature swings between day and night can be more pronounced than in coastal areas.
Historical Context
Current AQI of 28 reflects recent monitoring data. Local conditions can shift with weather patterns, traffic volume, and seasonal factors.
24-Hour Hourly Forecast
Best window: 06:00 (AQI 27) · Peak AQI: 50 at 22:00
| Time | AQI | Temp (°F) | Humidity | Wind (mph) | PM2.5 | PM10 |
|---|---|---|---|---|---|---|
| 00:00 | 33 | 127.9 | 69% | 5.3 | 8.6 | 13.0 |
| 01:00 | 32 | 126.7 | 73% | 2.1 | 8.1 | 12.0 |
| 02:00 | 31 | 126.5 | 66% | 2.0 | 7.6 | 11.3 |
| 03:00 | 29 | 126.5 | 63% | 3.4 | 7.4 | 10.9 |
| 04:00 | 28 | 124.5 | 67% | 4.1 | 7.3 | 10.7 |
| 05:00 | 28 | 123.1 | 73% | 2.9 | 6.8 | 9.8 |
| 06:00 | 27 | 123.3 | 72% | 2.2 | 6.3 | 9.0 |
| 07:00 | 27 | 124.9 | 74% | 1.8 | 5.8 | 8.1 |
| 08:00 | 27 | 134.2 | 70% | 0.7 | 5.6 | 8.1 |
| 09:00 | 27 | 138.6 | 62% | 1.7 | 5.7 | 8.2 |
| 10:00 | 28 | 142.0 | 55% | 4.2 | 5.8 | 8.3 |
| 11:00 | 28 | 145.9 | 52% | 6.0 | 5.8 | 8.3 |
| 12:00 | 28 | 148.1 | 53% | 6.8 | 5.7 | 8.1 |
| 13:00 | 29 | 151.7 | 51% | 7.5 | 5.5 | 7.9 |
| 14:00 | 32 | 151.9 | 52% | 8.3 | 5.2 | 7.3 |
| 15:00 | 34 | 153.3 | 50% | 7.6 | 4.4 | 6.2 |
| 16:00 | 37 | 152.6 | 51% | 7.8 | 3.3 | 4.6 |
| 17:00 | 40 | 161.6 | 26% | 6.0 | 2.5 | 3.2 |
| 18:00 | 43 | 163.4 | 19% | 10.5 | 2.4 | 3.0 |
| 19:00 | 46 | 158.0 | 20% | 10.9 | 2.6 | 3.1 |
| 20:00 | 48 | 153.7 | 20% | 9.6 | 2.7 | 3.3 |
| 21:00 | 49 | 150.4 | 22% | 10.7 | 2.8 | 3.3 |
| 22:00 | 50 | 146.8 | 24% | 9.3 | 2.9 | 3.4 |
| 23:00 | 50 | 144.7 | 26% | 9.9 | 3.0 | 3.6 |
Air quality is forecast to be good for most of the day. Great time for outdoor activities!
Planning your day in San Francisco? The hourly forecast shows the best air quality during 06:00 (AQI 27) with a low of 27 at 06:00. The most challenging conditions occur around 22:00 (AQI 50) when AQI peaks at 50 at 22:00. According to standard health guidance, the forecast for San Francisco can help with planning but should be used alongside current readings. Air quality is forecast to be good for most of the day. Great time for outdoor activities! Conditions in specific parts of 94129 may differ from the overall forecast.