Today | Weather | Monday, October 5, 2026

Weather in San Francisco, California

09:13 AM
Now
Cloudy Weather
66° F
Feels Like 66°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 2
Humidity 73 %
Today
Cloudy Weather
Day 81°
Night 61°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5

San Francisco Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 5, 2025)
Cloudy Night

Day

73°

Night

55°

Wind

5 mph

Precipitation

0 %

Air Quality in San Francisco

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

Pollutant Concentrations:

PM2.5 10.27 µg/m³
PM10 20.91 µg/m³
O3 0.035 ppm
NO2 0.9 ppb
SO2 0.4 ppb
CO 0.12 ppm
NH3 0 µg/m³
NO 0.11 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)
PM2.5 – 10.27 µg/m³
PM10 – 20.91 µg/m³
O3 – 69.03 µg/m³
NO2 – 1.67 µg/m³
SO2 – 0.94 µg/m³
CO – 132.7 µg/m³
NH3 – 0 µg/m³
NO – 0.11 µg/m³