Today | Weather | Monday, April 27, 2026

Weather in Antioch, California

12:24 PM
Now
Cloudy Weather
64° F
Feels Like 73°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 8
Humidity 53 %
Today
Cloudy Weather
Day 68°
Night 48°
Precipitation 10 %
Wind 7 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Antioch Weather Forecast Updated

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

Day

61°

Night

46°

Wind

6 mph

UV Index

2

Precipitation

25 %

Air Quality in Antioch

NOW
55 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.85 µg/m³
PM10 4.46 µg/m³
O3 0.056 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.04 µg/m³
NO 0.12 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)
PM2.51.85 µg/m³
PM104.46 µg/m³
O3109.46 µg/m³
NO20.62 µg/m³
SO20.71 µg/m³
CO132.9 µg/m³
NH30.04 µg/m³
NO0.12 µg/m³