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Today | Weather | Sunday, December 14, 2025
Active Weather Warnings

Weather in Chula Vista, California

05:12 AM
Now
Foggy Weather
54° F
Feels Like 52°
Precipitation 42 %
Wind 5 mph
Humidity 96 %
Today
Cloudy Weather
Day 66°
Night 50°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3

Chula Vista Weather Forecast Updated

59 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 14, 2024)
Cloudy Night

Day

66°

Night

48°

Wind

4 mph

Precipitation

0 %

Air Quality in Chula Vista

NOW
58 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 15.53 µg/m³
PM10 26.11 µg/m³
O3 0.042 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.13 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 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 – 15.53 µg/m³
PM10 – 26.11 µg/m³
O3 – 82.96 µg/m³
NO2 – 0.51 µg/m³
SO2 – 0.65 µg/m³
CO – 147.49 µg/m³
NH3 – 0 µg/m³
NO – 0 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for Chula Vista

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued December 13 at 11:24PM PST until December 14 at 9:00AM PST by NWS San Diego CA
Dec 13, 11:24 PM → Dec 14, 9:00 AM
WHAT: Visibility one quarter mile or less in dense fog.

WHERE: San Diego County Coastal Areas and San Diego County
Valleys.

WHEN: Until 9 AM PST Sunday.

IMPACTS: Low visibility could make driving conditions hazardous,
including along portions of I-15, I-8, and Highway 163.
+ Read More
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Updated: Dec 14, 4:12 AM Source: NWS Alert