Today | Weather | Tuesday, August 4, 2026

Weather in Cambridge, Massachusetts

11:54 PM
Today
Cloudy Night
Day 84°
Night 66°
Precipitation 3 %
Wind 5 mph

Cambridge Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 4, 2025)
Cloudy Night

Day

82°

Night

63°

Wind

5 mph

Precipitation

1 %

Air Quality in Cambridge

NOW
30 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 7.15 µg/m³
PM10 8.85 µg/m³
O3 0.029 ppm
NO2 3.6 ppb
SO2 0.3 ppb
CO 0.14 ppm
NH3 0.23 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.57.15 µg/m³
PM108.85 µg/m³
O357.24 µg/m³
NO26.85 µg/m³
SO20.69 µg/m³
CO154.82 µg/m³
NH30.23 µg/m³
NO0 µg/m³