Today | Weather | Sunday, September 20, 2026

Weather in Lowell, Massachusetts

03:47 PM
Now
Rainy Weather
61° F
Feels Like 55°
Precipitation 81 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 81 %
Today
Rainy Weather
Day 61°
Night 52°
Precipitation 100 %
Wind 5 mph
UV Index (0 - 11+) 1

Lowell Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 20, 2025)
Night

Day

72°

Night

39°

Wind

4 mph

Precipitation

0 %

Air Quality in Lowell

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.03 µg/m³
PM10 1.41 µg/m³
O3 0.036 ppm
NO2 0.9 ppb
SO2 0.1 ppb
CO 0.16 ppm
NH3 0.03 µg/m³
NO 0.05 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)
PM2.51.03 µg/m³
PM101.41 µg/m³
O371 µg/m³
NO21.6 µg/m³
SO20.28 µg/m³
CO178.68 µg/m³
NH30.03 µg/m³
NO0.05 µg/m³