Today | Weather | Tuesday, August 25, 2026

Weather in Cambridge, Massachusetts

01:20 AM
Now
Cloudy Night
64° F
Feels Like 64°
Precipitation 36 %
Wind 7 mph
Humidity 89 %
Today
Cloudy Weather
Day 81°
Night 61°
Precipitation 20 %
Wind 9 mph
UV Index (0 - 11+) 7

Cambridge Weather Forecast Updated

33 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 25, 2025)
Night

Day

79°

Night

63°

Wind

7 mph

Precipitation

1 %

Air Quality in Cambridge

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.15 µg/m³
PM10 8.08 µg/m³
O3 0.035 ppm
NO2 3.7 ppb
SO2 0.5 ppb
CO 0.14 ppm
NH3 0.17 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)
PM2.56.15 µg/m³
PM108.08 µg/m³
O368.8 µg/m³
NO26.91 µg/m³
SO21.38 µg/m³
CO160.02 µg/m³
NH30.17 µg/m³
NO0 µg/m³