Today | Weather | Monday, January 19, 2026

Weather in San Diego, California

08:01 PM
Now
Cloudy Night
61° F
Feels Like 61°
Precipitation 0 %
Wind 4 mph
Humidity 71 %
Today
Sunny Weather
Day 75°
Night 46°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3

San Diego Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (January 19, 2025)
Cloudy Weather

Day

63°

Night

48°

Wind

6 mph

UV Index

3

Precipitation

0 %

Air Quality in San Diego

NOW
122 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 44.13 µg/m³
PM10 57.56 µg/m³
O3 0.054 ppm
NO2 0.4 ppb
SO2 0.2 ppb
CO 0.21 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.544.13 µg/m³
PM1057.56 µg/m³
O3106.93 µg/m³
NO20.82 µg/m³
SO20.61 µg/m³
CO237.24 µg/m³
NH30 µg/m³
NO0 µg/m³