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Steilacoom (Washington) (US)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Rain
5°C
Rain
Humidity
72.3%
Wind
3 m/s
Pressure
1012.2 hPa
Direction
21°
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
5° / 12°
Precip.
10.8mm
Max wind
6.5 m/s

Hourly Forecast

22.02
Now
Weather
0.5
22.02
06:00
Weather
0.8
22.02
07:00
Weather
0.4
22.02
08:00
Weather
22.02
09:00
Weather
5
22.02
10:00
Weather
0.1
6
22.02
11:00
Weather
0.8
22.02
12:00
Weather
0.5
22.02
13:00
Weather
0.6
22.02
14:00
Weather
22.02
15:00
Weather
22.02
16:00
Weather
0.2
22.02
17:00
Weather
0.7
22.02
18:00
Weather
22.02
19:00
Weather
22.02
20:00
Weather
11°
22.02
21:00
Weather
12°
7
22.02
22:00
Weather
12°
6
22.02
23:00
Weather
12°
0.3
6
23.02
00:00
Weather
11°
1.1
6
23.02
01:00
Weather
10°
1.3
23.02
02:00
Weather
2
23.02
03:00
Weather
0.7
23.02
04:00
Weather
0.8
5

Temperature

12°C
5°C
05:00
5°C
06:00
6°C
07:00
5°C
08:00
6°C
09:00
6°C
10:00
7°C
11:00
6°C
12:00
5°C
13:00
6°C
14:00
6°C
15:00
5°C
16:00
6°C
17:00
5°C
18:00
6°C
19:00
8°C
20:00
11°C
21:00
12°C
22:00
12°C
23:00
12°C
00:00
11°C
01:00
10°C
02:00
8°C
03:00
8°C
04:00
8°C
05:00 16:00 04:00

Precipitation

2mm
0mm
05:00
0.5mm
06:00
0.8mm
07:00
0.4mm
10:00
0.1mm
11:00
0.8mm
12:00
0.5mm
13:00
0.6mm
16:00
0.2mm
17:00
0.7mm
23:00
0.3mm
00:00
1.1mm
01:00
1.3mm
02:00
2mm
03:00
0.7mm
04:00
0.8mm
05:00 16:00 04:00

Wind

6.5m/s
0m/s
05:00
2.7 m/s
06:00
3 m/s
07:00
3.3 m/s
08:00
4.9 m/s
09:00
5.3 m/s
10:00
5.7 m/s
11:00
3.9 m/s
12:00
1.7 m/s
13:00
3.1 m/s
14:00
3.2 m/s
15:00
2.4 m/s
16:00
2 m/s
17:00
2.3 m/s
18:00
3.5 m/s
19:00
4.2 m/s
20:00
5 m/s
21:00
6.5 m/s
22:00
5.5 m/s
23:00
6 m/s
00:00
5.6 m/s
01:00
4.9 m/s
02:00
4.4 m/s
03:00
4.2 m/s
04:00
5.3 m/s
05:00 16:00 04:00

Radiation

No sensor within 100 km.

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
69.4 km
71
23.7%

Measurement time: 2026-02-22 05:00

Calculated from PM2.5/PM10

O3
73.7 km
78.37 µg/m3
49%

Measurement time: 2026-02-22 04:37

source: OpenWeatherMap

PM2.5
69.4 km
22 µg/m3
26.2%

Measurement time: 2026-02-22 05:00

source: Aqicn

NO2
73.7 km
4.91 µg/m3
2.5%

Measurement time: 2026-02-22 04:37

source: OpenWeatherMap

CO
73.7 km
0.17949 mg/m3
1.3%

Measurement time: 2026-02-22 04:37

source: OpenWeatherMap

PM10
73.7 km
1.55 µg/m3
1.1%

Measurement time: 2026-02-22 04:37

source: OpenWeatherMap

SO2
73.7 km
0.21 µg/m3
0.1%

Measurement time: 2026-02-22 04:37

source: OpenWeatherMap

Info


Region: Washington
Latitude: 47.16982
Longitude: -122.60263


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About Air Quality in Steilacoom

Air quality in Steilacoom is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Steilacoom

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Steilacoom?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Steilacoom

If you're planning outdoor activities in Steilacoom, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.