Today | Weather | Friday, December 5, 2025

Weather in Cambridge, Massachusetts

12:48 PM
Now
Sunny Weather
25° F
Feels Like 21°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 2
Humidity 35 %
Today
Cold Day
Day 27°
Night 23°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 2

Cambridge Weather Forecast Updated

23 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 5, 2024)
Cloudy Night

Day

39°

Night

27°

Wind

20 mph

Precipitation

3 %

Air Quality in Cambridge

NOW
37 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.68 µg/m³
PM10 1.23 µg/m³
O3 0.040 ppm
NO2 1.7 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.21 µg/m³
NO 0.48 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)
PM2.50.68 µg/m³
PM101.23 µg/m³
O378.27 µg/m³
NO23.2 µg/m³
SO20.79 µg/m³
CO131.95 µg/m³
NH30.21 µg/m³
NO0.48 µg/m³