Today | Weather | Sunday, July 26, 2026

Weather in Boston, Massachusetts

08:45 AM
Now
Cloudy Weather
66° F
Feels Like 68°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3
Humidity 66 %
Today
Cloudy Weather
Day 75°
Night 57°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

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.

Boston Weather Forecast Updated

56 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 26, 2025)
Cloudy Night

Day

77°

Night

66°

Wind

6 mph

Precipitation

2 %

Air Quality in Boston

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.31 µg/m³
PM10 3.78 µg/m³
O3 0.037 ppm
NO2 2 ppb
SO2 0.6 ppb
CO 0.10 ppm
NH3 0.2 µg/m³
NO 0.92 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)
PM2.52.31 µg/m³
PM103.78 µg/m³
O372.24 µg/m³
NO23.82 µg/m³
SO21.51 µg/m³
CO112.88 µg/m³
NH30.2 µg/m³
NO0.92 µg/m³