Today | Weather | Sunday, December 14, 2025

Weather in San Francisco, California

05:12 AM
Now
Foggy Weather
45° F
Feels Like 39°
Precipitation 0 %
Wind 7 mph
Humidity 93 %
Today
Cloudy Weather
Day 54°
Night 43°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 2

San Francisco Weather Forecast Updated

49 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 14, 2024)
Cloudy Night

Day

54°

Night

45°

Wind

6 mph

Precipitation

40 %

Air Quality in San Francisco

NOW
39 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 8.29 µg/m³
PM10 13.56 µg/m³
O3 0.042 ppm
NO2 0.5 ppb
SO2 0.4 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0 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)
PM2.58.29 µg/m³
PM1013.56 µg/m³
O383.09 µg/m³
NO20.89 µg/m³
SO21.09 µg/m³
CO118.18 µg/m³
NH30 µg/m³
NO0 µg/m³