Today | Weather | Thursday, February 26, 2026

Weather in Boston, Massachusetts

02:50 AM
Now
Cloudy Night
30° F
Feels Like 21°
Precipitation 6 %
Wind 9 mph
Humidity 95 %
Today
Cloudy Weather
Day 39°
Night 18°
Precipitation 8 %
Wind 9 mph
UV Index (0 - 11+) 3
Overnight Frost 2 AM – 5 AM
Tomorrow Morning Frost 3 AM – 9 AM

Boston Weather Forecast Updated

49 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 26, 2025)
Cloudy Weather

Day

52°

Night

36°

Wind

12 mph

UV Index

3

Precipitation

2 %

Air Quality in Boston

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

Pollutant Concentrations:

PM2.5 17.84 µg/m³
PM10 20.83 µg/m³
O3 0.029 ppm
NO2 11.6 ppb
SO2 0.8 ppb
CO 0.26 ppm
NH3 0.12 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:

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)
PM2.517.84 µg/m³
PM1020.83 µg/m³
O356.32 µg/m³
NO221.89 µg/m³
SO22.13 µg/m³
CO295.26 µg/m³
NH30.12 µg/m³
NO0 µg/m³