Today | Weather | Saturday, October 24, 2026

Weather in Chula Vista, California

01:58 PM
Now
Sunny Weather
73° F
Feels Like 75°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 4
Humidity 57 %
Today
Sunny Weather
Day 73°
Night 57°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 4

Chula Vista Weather Forecast Updated

51 seconds ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 24, 2025)
Cloudy Night

Day

72°

Night

57°

Wind

4 mph

Precipitation

49 %

Air Quality in Chula Vista

NOW
54 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.06 µg/m³
PM10 9.33 µg/m³
O3 0.055 ppm
NO2 0.2 ppb
SO2 0.3 ppb
CO 0.13 ppm
NH3 0 µg/m³
NO 0.06 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)
PM2.5 – 6.06 µg/m³
PM10 – 9.33 µg/m³
O3 – 108.7 µg/m³
NO2 – 0.45 µg/m³
SO2 – 0.81 µg/m³
CO – 150.23 µg/m³
NH3 – 0 µg/m³
NO – 0.06 µg/m³