Today | Weather | Saturday, April 4, 2026

Weather in Carlsbad, California

10:46 PM
Now
Night
57° F
Feels Like 57°
Precipitation 0 %
Wind 2 mph
Humidity 96 %
Today
Night
Day 82°
Night 46°
Precipitation 1 %
Wind 4 mph

Carlsbad Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 4, 2025)
Sunny Weather

Day

64°

Night

41°

Wind

8 mph

UV Index

8

Precipitation

1 %

Air Quality in Carlsbad

NOW
63 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 11.92 µg/m³
PM10 22.01 µg/m³
O3 0.058 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.13 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:

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)
PM2.511.92 µg/m³
PM1022.01 µg/m³
O3114.42 µg/m³
NO20.59 µg/m³
SO20.66 µg/m³
CO138.11 µg/m³
NH30.13 µg/m³
NO0 µg/m³