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

Weather in Antioch, California

05:05 AM
Now
Foggy Weather
39° F
Feels Like 36°
Precipitation 34 %
Wind 5 mph
Humidity 100 %
Today
Cloudy Weather
Day 48°
Night 37°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 2

Antioch Weather Forecast Updated

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

Day

57°

Night

39°

Wind

6 mph

Precipitation

1 %

Air Quality in Antioch

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

Pollutant Concentrations:

PM2.5 20.13 µg/m³
PM10 26.76 µg/m³
O3 0.029 ppm
NO2 6.8 ppb
SO2 0.4 ppb
CO 0.19 ppm
NH3 0.15 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 – 20.13 µg/m³
PM10 – 26.76 µg/m³
O3 – 57.9 µg/m³
NO2 – 12.85 µg/m³
SO2 – 0.97 µg/m³
CO – 221.04 µg/m³
NH3 – 0.15 µg/m³
NO – 0 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for Antioch

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued December 13 at 9:01PM PST until December 14 at 11:00AM PST by NWS San Francisco CA
Dec 13, 9:01 PM → Dec 14, 11:00 AM
WHAT: Visibility one quarter mile or less in dense fog.

WHERE: East Bay Interior Valleys and North Bay Interior Valleys.

WHEN: Until 11 AM PST Sunday.

IMPACTS: Low visibility could make driving conditions hazardous.
+ Read More
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Updated: Dec 14, 3:44 AM Source: NWS Alert