Today | Weather | Monday, December 29, 2025

Weather in San Francisco, California

09:14 PM
Now
Night
50° F
Feels Like 46°
Precipitation 0 %
Wind 7 mph
Humidity 69 %
Today
Night
Day 61°
Night 43°
Precipitation 0 %
Wind 7 mph

San Francisco Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 29, 2024)
Partly Sunny with Showers

Day

59°

Night

45°

Wind

14 mph

UV Index

2

Precipitation

85 %

Air Quality in San Francisco

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.96 µg/m³
PM10 11.16 µg/m³
O3 0.033 ppm
NO2 7.3 ppb
SO2 1 ppb
CO 0.19 ppm
NH3 0.45 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)
PM2.55.96 µg/m³
PM1011.16 µg/m³
O363.84 µg/m³
NO213.79 µg/m³
SO22.63 µg/m³
CO214.98 µg/m³
NH30.45 µg/m³
NO0 µg/m³