Today | Weather | Monday, September 21, 2026

Weather in Tacoma, Washington

10:56 AM
Now
Cloudy Weather
54° F
Feels Like 54°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 94 %
Today
Cloudy Weather
Day 66°
Night 55°
Precipitation 1 %
Wind 5 mph
UV Index (0 - 11+) 3

Tacoma Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Night

Day

70°

Night

46°

Wind

5 mph

Precipitation

4 %

Air Quality in Tacoma

NOW
28 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.44 µg/m³
PM10 3.64 µg/m³
O3 0.030 ppm
NO2 2.2 ppb
SO2 0.5 ppb
CO 0.12 ppm
NH3 0.18 µg/m³
NO 0.3 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)
PM2.52.44 µg/m³
PM103.64 µg/m³
O358.77 µg/m³
NO24.05 µg/m³
SO21.2 µg/m³
CO133.11 µg/m³
NH30.18 µg/m³
NO0.3 µg/m³