Today | Weather | Thursday, March 12, 2026

Weather in Fairfield, California

10:39 PM
Now
Night
55° F
Feels Like 52°
Precipitation 0 %
Wind 7 mph
Humidity 76 %
Today
Cloudy Night
Day 79°
Night 43°
Precipitation 0 %
Wind 7 mph

Fairfield Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 12, 2025)
Rainy Weather

Day

59°

Night

43°

Wind

15 mph

UV Index

1

Precipitation

100 %

Air Quality in Fairfield

NOW
38 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.95 µg/m³
PM10 7.29 µg/m³
O3 0.042 ppm
NO2 1.8 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.11 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)
PM2.52.95 µg/m³
PM107.29 µg/m³
O381.57 µg/m³
NO23.38 µg/m³
SO20.91 µg/m³
CO132.8 µg/m³
NH30.11 µg/m³
NO0 µg/m³