Today | Weather | Thursday, December 11, 2025

Weather in Concord, California

05:46 AM
Now
Cloudy Weather
39° F
Feels Like 41°
Precipitation 5 %
Wind 4 mph
Humidity 99 %
Today
Cloudy Weather
Day 55°
Night 39°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 2

Concord Weather Forecast Updated

6 minutes ago
Last updated on
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
73 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 22.75 µg/m³
PM10 29.45 µg/m³
O3 0.014 ppm
NO2 15.6 ppb
SO2 0.9 ppb
CO 0.32 ppm
NH3 0.7 µg/m³
NO 0.01 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)
PM2.522.75 µg/m³
PM1029.45 µg/m³
O328.37 µg/m³
NO229.35 µg/m³
SO22.44 µg/m³
CO362.76 µg/m³
NH30.7 µg/m³
NO0.01 µg/m³