Today | Weather | Thursday, December 11, 2025

Weather in Concord, California

10:19 AM
Now
Cloudy Weather
45° F
Feels Like 45°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 99 %
Today
Cloudy Weather
Day 55°
Night 39°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 2

Concord Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (December 11, 2024)
Rainy Weather

Day

55°

Night

46°

Wind

9 mph

Precipitation

94 %

Air Quality in Concord

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

Pollutant Concentrations:

PM2.5 20.39 µg/m³
PM10 27.49 µg/m³
O3 0.021 ppm
NO2 10.8 ppb
SO2 0.9 ppb
CO 0.29 ppm
NH3 0.74 µg/m³
NO 6.05 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)
PM2.520.39 µg/m³
PM1027.49 µg/m³
O341.54 µg/m³
NO220.37 µg/m³
SO22.48 µg/m³
CO336.25 µg/m³
NH30.74 µg/m³
NO6.05 µg/m³