Today | Weather | Wednesday, March 18, 2026

Weather in Fairfield, California

03:47 AM
Now
Cloudy Night
54° F
Feels Like 52°
Precipitation 0 %
Wind 6 mph
Humidity 100 %
Today
Cloudy Weather
Day 90°
Night 52°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 5

Fairfield Weather Forecast Updated

38 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Cloudy Weather

Day

63°

Night

36°

Wind

4 mph

UV Index

5

Precipitation

3 %

Air Quality in Fairfield

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.57 µg/m³
PM10 11.03 µg/m³
O3 0.033 ppm
NO2 4.5 ppb
SO2 0.4 ppb
CO 0.15 ppm
NH3 0.25 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)
PM2.56.57 µg/m³
PM1011.03 µg/m³
O364.37 µg/m³
NO28.44 µg/m³
SO20.92 µg/m³
CO167.81 µg/m³
NH30.25 µg/m³
NO0 µg/m³