Today | Weather | Thursday, August 6, 2026

Weather in San Francisco, California

12:04 AM
Now
Cloudy Night
59° F
Feels Like 55°
Precipitation 0 %
Wind 8 mph
Humidity 87 %
Today
Cloudy Weather
Day 70°
Night 57°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

San Francisco Weather Forecast Updated

51 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 6, 2025)
Cloudy Night

Day

79°

Night

57°

Wind

9 mph

Precipitation

0 %

Air Quality in San Francisco

NOW
154 AQI
Unhealthy air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 63.43 µg/m³
PM10 82.58 µg/m³
O3 0.050 ppm
NO2 0.6 ppb
SO2 0.4 ppb
CO 0.23 ppm
NH3 0.29 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)
PM2.563.43 µg/m³
PM1082.58 µg/m³
O397.57 µg/m³
NO21.09 µg/m³
SO21.07 µg/m³
CO262.28 µg/m³
NH30.29 µg/m³
NO0 µg/m³