Today | Weather | Thursday, October 8, 2026
Active Weather Warnings

Weather in Antioch, California

05:49 AM
Now
Night
64° F
Feels Like 63°
Precipitation 0 %
Wind 7 mph
Humidity 58 %
Today
Hot Day
Day 99°
Night 64°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 4

Antioch Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 8, 2025)
Cloudy Night

Day

72°

Night

55°

Wind

7 mph

Precipitation

3 %

Air Quality in Antioch

NOW
43 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 10.29 µg/m³
PM10 22.82 µg/m³
O3 0.036 ppm
NO2 2 ppb
SO2 0.4 ppb
CO 0.13 ppm
NH3 0.04 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)
PM2.5 – 10.29 µg/m³
PM10 – 22.82 µg/m³
O3 – 70.29 µg/m³
NO2 – 3.83 µg/m³
SO2 – 1.13 µg/m³
CO – 151.18 µg/m³
NH3 – 0.04 µg/m³
NO – 0 µg/m³

Weather Alerts and Warnings for Antioch

Moderate Expected Likely

Heat Advisory

Heat Advisory issued October 7 at 10:15PM PDT until October 8 at 10:00PM PDT by NWS San Francisco CA
Oct 7, 10:15 PM → Oct 8, 10:00 PM
WHAT: Hot conditions with maximum temperatures in the mid-90s to
near 105. Mild minimum temperatures and weak onshore flow will
limit overnight relief.

WHERE: The East Bay and San Francisco Bay Shoreline, North Bay
Interior Mountains and Valleys, The Santa Clara Valley and Eastern
Hills, The Santa Cruz Mountains, Interior Monterey County and the
Santa Lucia Range, Most of San Benito County and the Cholame Hills
in Southeast Monterey County, and Southern Salinas Valley/Arroyo
Seco and Lake San Antonio.

WHEN: Until 10 PM PDT Thursday.

IMPACTS: This level of heat affects anyone without effective
cooling and/or adequate hydration. Impacts likely in some health
systems, heat-sensitive industries and infrastructure.
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Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke.
Updated: Oct 8, 4:39 AM Source: NWS Alert