Seattle air quality · Washington, United States
Healthy air supports better stamina during outdoor workouts
US AQI 49 (Good) in Seattle, from 1 AirNow monitoring station. Main pollutant: PM2.5.
Updated
Pollutants in Seattle
- PM2.549AQI
- PM1018AQI
- NO₂12AQI
- Ozone6AQI
US values are per-pollutant AQI from the highest-reading monitor near Seattle (Kent-S 236th).
Is it safe outside in Seattle right now?
Air quality is satisfactory and poses little or no risk.
Walking and commuting
Go aheadEnjoy it.
Running and jogging
Go aheadA great time to run outdoors.
Cycling
Go aheadRide freely.
Children playing outside
Go aheadNo limits.
Older adults and heart or lung conditions
Go aheadNo limits.
Open windows
Go aheadAir out your home.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededNot needed.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
What US AQI 0–50 means for your health →
Seattle air quality history
Daily average, 36 days- 47average daily US AQI over 36 days
- 68worst day, 8 October
- 28cleanest day, 29 September
- 0days at Unhealthy or worse
The last 7 days averaged 46, about the same as the week before (50). 23 of the last 36 days were Good.
Weather in Seattle
No active National Weather Service alerts for Seattle.
| Day | Forecast | High | Low | Rain |
|---|---|---|---|---|
| Mon 19 | Mostly Cloudy | 61°F | 46°F | 2% |
| Tue 20 | Mostly Sunny | 61°F | 45°F | 0% |
| Wed 21 | Sunny | 64°F | 46°F | 1% |
| Thu 22 | Mostly Cloudy then Chance Light Rain | 57°F | 46°F | 44% |
| Fri 23 | Mostly Sunny | 55°F | 45°F | 18% |
| Sat 24 | Chance Light Rain | 55°F | 46°F | 53% |
| Sun 25 | Chance Light Rain | 57°F | 46°F | 40% |
National Weather Service forecast. All US weather alerts →
Nearby cities
US rankingRelated reading
GuidesHow to improve indoor air quality at home, and when to open the windows
NewsNor'easter hits the Outer Banks: Hatteras visitors ordered out, NC 12 expected to close, 2 to 4 feet of flooding
ExplainersFirst freeze of the season: what a freeze warning, freeze watch and frost advisory mean this weekend
Seattle air quality: common questions
What is the AQI in Seattle right now?
The US AQI in Seattle is 49 (Good). The main pollutant is PM2.5.
Is it safe to go outside in Seattle today?
A great time to be outside. Air quality is satisfactory and poses little or no risk. For runners: A great time to run outdoors.
How has air quality in Seattle been recently?
Over the last 36 days with data, Seattle averaged US AQI 47. The worst day was 8 October at 68; the cleanest was 29 September at 28. 0 days were at Unhealthy or worse.
Where does Seattle's air quality data come from?
From US EPA AirNow, using 1 monitoring station in and around the city. Good Air does not estimate or adjust these readings.
Source: US EPA AirNow. Readings are published by the monitoring agency and may be revised.