Today | Weather | Thursday, October 30, 2025

Weather in San Francisco, California

11:31 AM

Now

63° F

Feels Like 59°

Precipitation 0 %

Wind 9 mph

UV Index (0 - 11+) 1

Humidity 77 %

Today

Day 64°

Night 54°

Precipitation 0 %

Wind 10 mph

UV Index (0 - 11+) 3

San Francisco Weather Forecast Updated

6 minutes ago

Last updated on October 30, 2025 11:25 AM

Weather Forecast History

Last Year's Weather on This Day (October 30, 2024)

Day

61°

Night

54°

Wind

7 mph

Precipitation

Air Quality in San Francisco

NOW

40 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 8.43 µg/m³

PM₁₀ 31.74 µg/m³

O₃ 0.043 ppm

NO₂ 0.4 ppb

SO₂ 0.3 ppb

CO 0.09 ppm

NH₃ 0 µg/m³

NO 0.07 µg/m³

PM_2.5 – 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)

PM_2.5 – 8.43 µg/m³

PM₁₀ – 31.74 µg/m³

O₃ – 84.33 µg/m³

NO₂ – 0.66 µg/m³

SO₂ – 0.83 µg/m³

CO – 102.82 µg/m³

NH₃ – 0 µg/m³

NO – 0.07 µg/m³

View Hourly Air Quality Forecast