Today | Weather | Monday, April 27, 2026

Weather in Chula Vista, California

05:53 PM
Now
Cloudy Weather
66° F
Feels Like 64°
Precipitation 40 %
Wind 12 mph
UV Index (0 - 11+) 2
Humidity 60 %
Today
Partly Sunny with Showers
Day 66°
Night 54°
Precipitation 49 %
Wind 8 mph
UV Index (0 - 11+) 4

Chula Vista Weather Forecast Updated

14 seconds ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Cloudy Weather

Day

64°

Night

57°

Wind

9 mph

UV Index

10

Precipitation

25 %

Air Quality in Chula Vista

NOW
58 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.8 µg/m³
PM10 1.89 µg/m³
O3 0.056 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.02 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)
PM2.50.8 µg/m³
PM101.89 µg/m³
O3110.82 µg/m³
NO20.2 µg/m³
SO20.23 µg/m³
CO121.8 µg/m³
NH30 µg/m³
NO0.02 µg/m³