Air Quality in Cambridge, United States

Drizzle
18.8°C · 91.7% humidity
18.8°
Feels 18.8°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
72 10am
72
52
68 1pm
63
60
58 4pm
56
55
54 7pm
54
53
46 10pm
46
43
43 1am
42
42
42 4am
42
42
42 7am
42
42
Station readings
85
68
60
CAMS model adj +18
54
54
34
34
34
34
34
34
34
34
34
34
27
27
25
25
24
24
24
24
24
24
24
24
AD 728×90

Air Quality Index Trend

47h · 1 stn

Cambridge's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Cambridge is 1.3× the WHO 24-hour guideline of 15 µg/m³.

91.7%
Humidity
61.5 km/h
Wind NE
1014.1 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
68
20.16 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Cambridge?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.520.16 µg/m³ ×1.3 WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (2 stations within 25 km)
20.16
Median
17.0
Average
12.45
Low
21.55
High
PM2.5 µg/m³ · Model: 13.7 · Bias: -6.5

What is the 7-day forecast for Cambridge?

07-21
27.2° 18.8°
4.19 mm
07-22
22.7° 14.9°
9.25 mm
07-23
27.7° 16.7°
1.81 mm
07-24
26.5° 14.9°
2.31 mm
07-25
35.5° 20.6°
2.88 mm
07-26
23.5° 17.0°
1.63 mm
07-27
28.8° 14.9°
5.94 mm
Both models agree Avg diff: 3.6°C

Where are air quality stations near Cambridge?

60
Magazine Beach Park
2.3 km PM2.5: 16.4 µg/m³ PM10: 16.8 µg/m³
14
Boston
4.2 km PM2.5: 3.4 µg/m³
37
Boston
4.2 km PM2.5: 8.9 µg/m³
52
Nubian Square - DEP Station
5.4 km PM2.5: 12.8 µg/m³
9
Boston Roxbury
5.4 km PM2.5: 2.2 µg/m³
38
Milton Blue Hill Observatory
18.2 km PM2.5: 9.1 µg/m³

What cities are near Cambridge?

66 Somerville 70 Allston 61 Back Bay 64 Fenway/Kenmore 62 Charlestown 59 Boston 60 Mission Hill 65 Medford 63 Brookline 67 Brighton
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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 2026-07-21T17:14 UTC.