Today | Weather | Friday, June 5, 2026

Weather in Cambridge, Massachusetts

09:01 PM
Now
Cloudy Night
73° F
Feels Like 72°
Precipitation 0 %
Wind 6 mph
Humidity 53 %
Today
Cloudy Night
Day 84°
Night 57°
Precipitation 3 %
Wind 5 mph

Cambridge Weather Forecast Updated

51 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (June 5, 2025)
Sunny with a Chance of Thunderstorms

Day

86°

Night

68°

Wind

7 mph

UV Index

10

Precipitation

40 %

Air Quality in Cambridge

NOW
175 AQI
Unhealthy air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 35.16 µg/m³
PM10 39.67 µg/m³
O3 0.095 ppm
NO2 2.2 ppb
SO2 0.9 ppb
CO 0.16 ppm
NH3 0.21 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)
PM2.535.16 µg/m³
PM1039.67 µg/m³
O3186.67 µg/m³
NO24.14 µg/m³
SO22.24 µg/m³
CO187.45 µg/m³
NH30.21 µg/m³
NO0 µg/m³