Today | Weather | Thursday, February 26, 2026

Weather in Chula Vista, California

12:38 AM
Now
Cloudy Night
57° F
Feels Like 57°
Precipitation 0 %
Wind 5 mph
Humidity 90 %
Today
Cloudy Weather
Day 75°
Night 54°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5

Chula Vista Weather Forecast Updated

16 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 26, 2025)
Cloudy Weather

Day

66°

Night

50°

Wind

6 mph

UV Index

5

Precipitation

0 %

Air Quality in Chula Vista

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.05 µg/m³
PM10 10.45 µg/m³
O3 0.036 ppm
NO2 0.3 ppb
SO2 0.1 ppb
CO 0.10 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:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.54.05 µg/m³
PM1010.45 µg/m³
O370.8 µg/m³
NO20.52 µg/m³
SO20.33 µg/m³
CO112.85 µg/m³
NH30 µg/m³
NO0 µg/m³