Today | Weather | Wednesday, May 27, 2026

Weather in Cambridge, Massachusetts

07:35 AM
Now
Cloudy Weather
70° F
Feels Like 70°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 2
Humidity 61 %
Today
Cloudy Weather
Day 90°
Night 61°
Precipitation 0 %
Wind 12 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Cambridge Weather Forecast Updated

57 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 27, 2025)
Cloudy Weather

Day

77°

Night

57°

Wind

6 mph

UV Index

10

Precipitation

0 %

Air Quality in Cambridge

NOW
77 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 24.69 µg/m³
PM10 27.79 µg/m³
O3 0.033 ppm
NO2 4 ppb
SO2 0.6 ppb
CO 0.20 ppm
NH3 0.08 µg/m³
NO 0.32 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.524.69 µg/m³
PM1027.79 µg/m³
O364.15 µg/m³
NO27.59 µg/m³
SO21.69 µg/m³
CO232.96 µg/m³
NH30.08 µg/m³
NO0.32 µg/m³