Today | Weather | Thursday, February 5, 2026

Weather in Fairfield, California

05:33 PM
Now
Cloudy Night
66° F
Feels Like 64°
Precipitation 0 %
Wind 6 mph
Humidity 57 %
Today
Cloudy Weather
Day 70°
Night 45°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3

Fairfield Weather Forecast Updated

19 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 5, 2025)
Cloudy Weather

Day

57°

Night

37°

Wind

6 mph

UV Index

3

Precipitation

2 %

Air Quality in Fairfield

NOW
144 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 52.98 µg/m³
PM10 60.67 µg/m³
O3 0.050 ppm
NO2 12.9 ppb
SO2 1.3 ppb
CO 0.36 ppm
NH3 0.99 µg/m³
NO 0.03 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.552.98 µg/m³
PM1060.67 µg/m³
O398.72 µg/m³
NO224.31 µg/m³
SO23.34 µg/m³
CO417.52 µg/m³
NH30.99 µg/m³
NO0.03 µg/m³