Today | Weather | Wednesday, May 6, 2026

Weather in San Francisco, California

01:41 AM
Now
Cloudy Weather
54° F
Feels Like 48°
Precipitation 0 %
Wind 9 mph
Humidity 96 %
Today
Cloudy Weather
Day 64°
Night 54°
Precipitation 5 %
Wind 10 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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

9 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 6, 2025)
Cloudy Weather

Day

68°

Night

55°

Wind

12 mph

UV Index

10

Precipitation

0 %

Air Quality in San Francisco

NOW
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.23 µg/m³
PM10 5.78 µg/m³
O3 0.050 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.11 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)
PM2.52.23 µg/m³
PM105.78 µg/m³
O398.45 µg/m³
NO20.43 µg/m³
SO20.52 µg/m³
CO123.65 µg/m³
NH30 µg/m³
NO0 µg/m³