Air Quality in Watertown, United States
Windy
9.7°C · 72.5% humidity
9.7°
Feels 4.7°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
AQI Forecast
24
5pm
24
24
19
8pm
20
21
22
11pm
23
23
23
2am
24
24
24
5am
24
24
24
8am
24
24
24
11am
24
24
25
2pm
25
25
Air Quality Index Trend
28h · 1 stnWatertown's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
72.5%
Humidity
60.3 km/h
Wind NW
1023.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.58 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Watertown?
Temperature & Precipitation
PM2.5 Trend
28h · 1 stationPM2.54.58 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Both models agree
Avg diff: 3.3°C
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:23 UTC.