Today | Weather | Monday, April 6, 2026

Weather in San Francisco, California

09:06 AM
Now
Foggy Weather
55° F
Feels Like 52°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 1
Humidity 83 %
Today
Cloudy Weather
Day 63°
Night 52°
Precipitation 0 %
Wind 13 mph
UV Index (0 - 11+) 7

San Francisco Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (April 6, 2025)
Cloudy Weather

Day

64°

Night

54°

Wind

8 mph

UV Index

7

Precipitation

5 %

Air Quality in San Francisco

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.63 µg/m³
PM10 13.49 µg/m³
O3 0.052 ppm
NO2 0.4 ppb
SO2 0.4 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.05 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)
PM2.54.63 µg/m³
PM1013.49 µg/m³
O3101.67 µg/m³
NO20.75 µg/m³
SO21.14 µg/m³
CO128.27 µg/m³
NH30 µg/m³
NO0.05 µg/m³