Today | Weather | Friday, October 31, 2025

Weather in Concord, California

11:50 PM
Now
Night
57° F
Feels Like 57°
Precipitation 0 %
Wind 5 mph
Humidity 84 %
Today
Sunny Weather
Day 79°
Night 52°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3

Concord Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 31, 2024)

Partly Sunny with Showers

Day

68°

Night

48°

Wind

8 mph

UV Index

3

Precipitation

40

Air Quality in Concord

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4 µg/m³
PM10 11.2 µg/m³
O3 0.039 ppm
NO2 1.1 ppb
SO2 0.3 ppb
CO 0.09 ppm
NH3 0.02 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)
PM2.54 µg/m³
PM1011.2 µg/m³
O375.83 µg/m³
NO21.99 µg/m³
SO20.86 µg/m³
CO103.85 µg/m³
NH30.02 µg/m³
NO0 µg/m³