Today | Weather | Sunday, October 25, 2026

Weather in Cambridge, Massachusetts

05:11 AM
Now
Night
34° F
Feels Like 32°
Precipitation 0 %
Wind 5 mph
Humidity 98 %
Today
Sunny Weather
Day 64°
Night 37°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3
Overnight Frost 4 AM – 7 AM

Cambridge Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 25, 2025)
Cloudy Night

Day

55°

Night

43°

Wind

5 mph

Precipitation

5 %

Air Quality in Cambridge

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

Pollutant Concentrations:

PM2.5 4.53 µg/m³
PM10 6.51 µg/m³
O3 0.011 ppm
NO2 11.4 ppb
SO2 0.3 ppb
CO 0.25 ppm
NH3 0.2 µg/m³
NO 0.01 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)
PM2.5 – 4.53 µg/m³
PM10 – 6.51 µg/m³
O3 – 22.38 µg/m³
NO2 – 21.36 µg/m³
SO2 – 0.77 µg/m³
CO – 284.04 µg/m³
NH3 – 0.2 µg/m³
NO – 0.01 µg/m³