Today | Weather | Tuesday, February 24, 2026

Weather in San Francisco, California

01:48 PM
Now
Rainy Weather
63° F
Feels Like 54°
Precipitation 70 %
Wind 18 mph
UV Index (0 - 11+) 1
Humidity 73 %
Today
Partly Sunny with Showers
Day 68°
Night 55°
Precipitation 90 %
Wind 12 mph
UV Index (0 - 11+) 4

San Francisco Weather Forecast Updated

25 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 24, 2025)
Partly Sunny with Showers

Day

63°

Night

46°

Wind

8 mph

UV Index

3

Precipitation

55 %

Air Quality in San Francisco

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.98 µg/m³
PM10 9.66 µg/m³
O3 0.048 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.09 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)
PM2.53.98 µg/m³
PM109.66 µg/m³
O393.62 µg/m³
NO20.48 µg/m³
SO20.58 µg/m³
CO125.02 µg/m³
NH30 µg/m³
NO0.09 µg/m³