Today | Weather | Sunday, August 23, 2026

Weather in Fairfield, California

10:10 PM
Now
Cloudy Night
72° F
Feels Like 70°
Precipitation 0 %
Wind 10 mph
Humidity 55 %
Today
Cloudy Weather
Day 95°
Night 61°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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.

Fairfield Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (August 23, 2025)
Cloudy Night

Day

90°

Night

61°

Wind

13 mph

Precipitation

0 %

Air Quality in Fairfield

NOW
28 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.81 µg/m³
PM10 13.73 µg/m³
O3 0.031 ppm
NO2 0.9 ppb
SO2 0.3 ppb
CO 0.07 ppm
NH3 0.03 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)
PM2.54.81 µg/m³
PM1013.73 µg/m³
O360.06 µg/m³
NO21.72 µg/m³
SO20.71 µg/m³
CO84.59 µg/m³
NH30.03 µg/m³
NO0 µg/m³