Today | Weather | Tuesday, December 30, 2025

Weather in San Francisco, California

12:53 AM
Now
Cloudy Weather
46° F
Feels Like 41°
Precipitation 7 %
Wind 9 mph
Humidity 82 %
Today
Cloudy Weather
Day 50°
Night 46°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 2

San Francisco Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 30, 2024)
Cloudy Weather

Day

57°

Night

45°

Wind

6 mph

UV Index

2

Precipitation

1 %

Air Quality in San Francisco

NOW
37 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 8.89 µg/m³
PM10 14.56 µg/m³
O3 0.024 ppm
NO2 8.6 ppb
SO2 1 ppb
CO 0.22 ppm
NH3 0.42 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)
PM2.58.89 µg/m³
PM1014.56 µg/m³
O347.78 µg/m³
NO216.21 µg/m³
SO22.75 µg/m³
CO248.27 µg/m³
NH30.42 µg/m³
NO0 µg/m³