Fine particles
6.9µg/m³Fair · 1 hourCAMS model • Open-Meteo
San FranciscoAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
San Francisco - latest available concentrations (November 10, 2026, 18:00 local time): PM2.5: 6.9 µg/m³, PM10: 8.8 µg/m³, O₃: 48 µg/m³, NO₂: 20.5 µg/m³, SO₂: 0.9 µg/m³, CO: 148 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
6 weather warnings in effect for United States
San Francisco · Air pollutant concentrations
Data time: November 10, 2026 · 18:00 · local timeParticulate matter
8.8µg/m³Good · 1 hourOzone
48µg/m³Good · 1 hourNitrogen dioxide
20.5µg/m³Fair · 1 hourSulphur dioxide
0.9µg/m³Good · 1 hourCarbon monoxide
148µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · San Francisco
San Francisco - air pollution over recent days (2026-08-30 - 2026-11-09)
Concentrations of all available pollutants for this city.
PM2.5Lowest 6.3 2026-11-08Highest 15.78 2026-11-072026-08-30 - 2026-11-09
PM10Lowest 7.52 2026-11-08Highest 18.6 2026-11-072026-08-30 - 2026-11-09
O₃Lowest 36.63 2026-11-09Highest 67.29 2026-11-032026-08-30 - 2026-11-09
NO₂Lowest 3.61 2026-08-31Highest 26.75 2026-11-072026-08-30 - 2026-11-09
SO₂Lowest 0.73 2026-09-06Highest 1.87 2026-11-072026-08-30 - 2026-11-09
COLowest 106.71 2026-08-30Highest 239.04 2026-11-092026-08-30 - 2026-11-09
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-11-09 | 2026-11-08 | 2026-11-07 | 2026-11-06 | 2026-11-05 | 2026-11-04 | 2026-11-03 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 | 2026-08-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 9.94 | 6.3 | 15.78 | 11.44 | 7.85 | 9.62 | 9.06 | 7.42 | 7.66 | 10.25 | 8.03 | 8.41 | 11.77 | 10.62 | 9.62 |
| PM10 | 11.83 | 7.52 | 18.6 | 14.02 | 9.39 | 10.97 | 13.13 | 11.25 | 11.03 | 14.73 | 12.15 | 12.24 | 17.86 | 16.28 | 14.87 |
| O₃ | 36.63 | 49.25 | 44.5 | 48.67 | 56.5 | 53 | 67.29 | 65.33 | 59 | 55.17 | 53.08 | 57.83 | 60.88 | 66.54 | 54.17 |
| NO₂ | 24.99 | 17.52 | 26.75 | 21.22 | 17.38 | 19.04 | 12.29 | 7.8 | 8.09 | 12.15 | 8.71 | 9.46 | 7.74 | 3.61 | 4.64 |
| SO₂ | 1.46 | 1.2 | 1.87 | 1.36 | 1.18 | 1.1 | 0.86 | 0.73 | 1.22 | 1.43 | 1.09 | 1.07 | 0.93 | 0.82 | 0.87 |
| CO | 239.04 | 175.54 | 228.79 | 211.75 | 220.79 | 184.83 | 176.79 | 147.92 | 156.21 | 143.5 | 132.67 | 129.71 | 122.63 | 119.5 | 106.71 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
Air quality in nearby cities
All cities →United States↗
San Jose
PM2.57.6
PM108.5
µg/m³
PM2.5 · FairNO₂ 24.8O₃ 49
November 10, 202618:00
United States↗
Los Angeles
PM2.512.7
PM1013.4
µg/m³
PM2.5 · FairNO₂ 64.7O₃ 29
November 10, 202618:00
United States↗
Phoenix
PM2.512.4
PM1016.1
µg/m³
PM2.5 · FairNO₂ 26.5O₃ 80
November 10, 202619:00
United States↗
Fort Worth
PM2.56.3
PM106.4
µg/m³
PM2.5 · FairNO₂ 26O₃ 37
November 10, 202620:00
United States↗
San Antonio
PM2.519.1
PM1019.9
µg/m³
PM2.5 · ModerateNO₂ 44.8O₃ 23
November 10, 202620:00
United States↗
Dallas
PM2.58.5
PM108.6
µg/m³
PM2.5 · FairNO₂ 37O₃ 29
November 10, 202620:00
United States↗
Austin
PM2.519
PM1019.3
µg/m³
PM2.5 · ModerateNO₂ 39.7O₃ 33
November 10, 202620:00
United States↗
Houston
PM2.545.3
PM1047.5
µg/m³
PM2.5 · ModerateNO₂ 78.1O₃ 27
November 10, 202620:00
United States · air quality in other cities
WEATHER & SURROUNDINGS
United States · weather forecast
Daily maximum and minimum temperatures. Forecast point: 38.0902, -94.7129. Forecast for a country reference point; conditions in the city may differ.
Scroll the forecast to see the following days.
United States · November 8, 2026: minimum temperature 2.9°C, maximum 19.4°C. Wind: 14.4 km/h. Humidity: 58%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-11-08 | 17.3 | 2.9 | 19.4 | 9.4 | 1 | 4 | 58 | 1 |
| 2026-11-09 | 21.3 | 5 | 22.3 | 10.4 | 34.3 | 5.1 | 46 | 1 |
| 2026-11-10 | 21.5 | 6.5 | 22.4 | 10.1 | 0.5 | 3.7 | 62 | 9 |
| 2026-11-11 | 20.5 | 9.2 | 20.5 | 9.8 | 0.2 | 7.5 | 48 | 32 |
| 2026-11-12 | 13 | 4.5 | 13 | 4.5 | 0.2 | 5.1 | 55 | 99 |
| 2026-11-13 | 6.7 | 0.1 | 7.2 | 1.1 | 2.6 | 3.1 | 59 | 90 |
| 2026-11-14 | 8.1 | -2.2 | 10 | 5.8 | — | 3.6 | 54 | 99 |
| 2026-11-15 | 11.2 | 3.9 | 11.2 | 6.2 | 1.7 | 4 | 45 | 67 |
| 2026-11-16 | 6 | 4.4 | 7 | 5.9 | 5.3 | 4.5 | 85 | 100 |
| 2026-11-17 | 8.9 | 5.8 | 9.8 | 8.6 | 4.6 | 4.3 | 64 | 100 |
| 2026-11-18 | 11.9 | 5.4 | 15.6 | 12.4 | 1.9 | 5.7 | 57 | 78 |
| 2026-11-19 | 10.1 | 9.7 | 11.5 | 11.4 | 25.5 | 5.6 | 97 | 100 |
| 2026-11-20 | 9.7 | 9.2 | 11.7 | 9.2 | 10 | 6 | 96 | 100 |
| 2026-11-21 | 10.7 | 9.2 | 12.8 | 12.8 | 14.2 | 6.4 | 97 | 100 |
| 2026-11-22 | 17.9 | 10.7 | 17.9 | 10.7 | 15.2 | 5.9 | 68 | 68 |
| 2026-11-23 | 8.6 | 4.9 | 9.6 | 4.9 | 7.3 | 7.8 | 58 | 56 |
| 2026-11-24 | 9.3 | 3.8 | 10.5 | 4 | — | 3.9 | 57 | 100 |
UV index by day · United States
Data for a country reference point. Local conditions may differ.
Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
United States · November 10, 2026: UV index: 3.9 .
| Indicator | 2026-11-10 | 2026-11-11 | 2026-11-12 | 2026-11-13 | 2026-11-14 | 2026-11-15 | 2026-11-16 | 2026-11-17 | 2026-11-18 | 2026-11-19 | 2026-11-20 | 2026-11-21 | 2026-11-22 | 2026-11-23 | 2026-11-24 | 2026-11-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 3.9 | 3.7 | 3.7 | 3.8 | 3.6 | 1.6 | 0.9 | 1.2 | 2.1 | 0.4 | 0.3 | 0.3 | 3.1 | 3.1 | 2.2 | — |
AIR QUALITY QUESTIONS
San Francisco · air pollution - questions and answers
What do the latest air quality data show for San Francisco?
San Francisco - latest available concentrations (November 10, 2026, 18:00 local time): PM2.5: 6.9 µg/m³, PM10: 8.8 µg/m³, O₃: 48 µg/m³, NO₂: 20.5 µg/m³, SO₂: 0.9 µg/m³, CO: 148 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in San Francisco over the past week?
The highest available daily mean PM2.5 was 15.8 µg/m³ (November 7, 2026). This comparison covers 7 days with data in the seven days before November 10, 2026. The day of the latest reading is excluded because it may be incomplete.
Is the PM2.5 concentration for San Francisco an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for San Francisco?
For November 10, 2026, the forecast UV index is 3.9. The UV section also shows the following available days. The forecast is for a country reference point (United States), not the city itself.
What wind speed is forecast for San Francisco?
For November 8, 2026, forecast wind speed is 14.4 km/h. The weather table includes wind, temperature and other available parameters for subsequent days. These data describe a country reference point (United States); local wind may differ.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.