Today | Weather | Thursday, October 30, 2025

Weather in San Diego, California

11:31 AM

Now

79° F

Feels Like 82°

Precipitation 0 %

Wind 6 mph

UV Index (0 - 11+) 4

Humidity 29 %

Today

Day 81°

Night 55°

Precipitation 0 %

Wind 5 mph

UV Index (0 - 11+) 4

San Diego Weather Forecast Updated

4 minutes ago

Last updated on October 30, 2025 11:27 AM

Weather Forecast History

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

Day

72°

Night

50°

Wind

4 mph

Precipitation

Air Quality in San Diego

NOW

66 AQI

Moderate air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 19.62 µg/m³

PM₁₀ 32.82 µg/m³

O₃ 0.047 ppm

NO₂ 0.4 ppb

SO₂ 0.2 ppb

CO 0.14 ppm

NH₃ 0 µg/m³

NO 0.11 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 19.62 µg/m³

PM₁₀ – 32.82 µg/m³

O₃ – 91.87 µg/m³

NO₂ – 0.66 µg/m³

SO₂ – 0.61 µg/m³

CO – 160.17 µg/m³

NH₃ – 0 µg/m³

NO – 0.11 µg/m³

View Hourly Air Quality Forecast