Air Quality in Watertown, United States

Windy
7.0°C · 60.1% humidity
7.0°
Feels 1.0°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
21 7pm
20
20
19 10pm
19
19
31 1am
31
31
31 4am
31
31
31 7am
31
31
31 10am
44
44
69 1pm
44
44
44 4pm
31
31
Station readings
21
20
20
CAMS model adj -6
25
25
25
25
25
25
37
37
37
37
37
37
37
37
37
37
50
50
75
50
50
50
37
37
AD 728×90

PM2.5 Trend (24h)

23h · 2 stations
60.1%
Humidity
58.7 km/h
Wind SSW
1031.8 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Watertown?

Temperature & Precipitation

PM2.54.86 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (1 station within 25 km)
4.86
Median
4.86
Average
4.86
Low
4.86
High
PM2.5 µg/m³ · Model: 23.4 · Bias: +18.5

What is the 7-day forecast for Watertown?

04-09
13.3° -0.7°
04-10
19.2° 3.4°
04-11
22.8° 7.9°
04-12
17.3° 7.3°
04-13
13.1° 8.5°
1.75 mm
04-14
26.5° 13.6°
0.25 mm
04-15
25.3° 19.1°
0.19 mm
Both models agree Avg diff: 4.3°C

Where are air quality stations near Watertown?

33
Magazine Beach Park
5.8 km PM2.5: 7.9 µg/m³ PM10: 9.2 µg/m³
20
Nubian Square - DEP Station
9.4 km PM2.5: 4.9 µg/m³
40
Boston
10.2 km
37
Boston Von Hillern
11.6 km
39
Boston Von Hillern
11.6 km
39
Milton Blue Hill Observatory
18.6 km
42
Milton Blue Hill Observatory
18.6 km
40
Lynn Water Treatment Plant
20.8 km
35
Lynn Water Treatment Plant
20.8 km

What cities are near Watertown?

20 Belmont 20 Brighton 20 Waltham 20 Chestnut Hill 20 Allston 20 Cambridge 20 Brookline 20 Somerville 20 Mission Hill 20 Fenway/Kenmore

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T22:55 UTC.