Today | Weather | Tuesday, December 9, 2025

Weather in Carlsbad, California

05:15 PM
Now
Night
70° F
Feels Like 66°
Precipitation 0 %
Wind 6 mph
Humidity 41 %
Today
Sunny Weather
Day 81°
Night 43°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3

Carlsbad Weather Forecast Updated

21 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 9, 2024)
Night

Day

64°

Night

34°

Wind

4 mph

Precipitation

0 %

Air Quality in Carlsbad

NOW
162 AQI
Unhealthy air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 77.48 µg/m³
PM10 93.24 µg/m³
O3 0.076 ppm
NO2 8.3 ppb
SO2 0.7 ppb
CO 0.48 ppm
NH3 0.62 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)
PM2.577.48 µg/m³
PM1093.24 µg/m³
O3148.98 µg/m³
NO215.6 µg/m³
SO21.88 µg/m³
CO549.77 µg/m³
NH30.62 µg/m³
NO0.05 µg/m³