Today | Weather | Wednesday, November 19, 2025

Weather in San Francisco, California

12:34 PM
Now
Cloudy Weather
61° F
Feels Like 59°
Precipitation 5 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 72 %
Today
Cloudy Weather
Day 61°
Night 52°
Precipitation 25 %
Wind 7 mph
UV Index (0 - 11+) 2

San Francisco Weather Forecast Updated

4 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 19, 2024)
Cloudy Weather

Day

57°

Night

52°

Wind

11 mph

Precipitation

25 %

Air Quality in San Francisco

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.56 µg/m³
PM10 8.56 µg/m³
O3 0.045 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0.03 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.52.56 µg/m³
PM108.56 µg/m³
O387.81 µg/m³
NO20.45 µg/m³
SO20.47 µg/m³
CO110.76 µg/m³
NH30 µg/m³
NO0.03 µg/m³