Today | Weather | Sunday, September 20, 2026

Weather in Lowell, Massachusetts

11:57 PM
Today
Rainy Weather
Day 61°
Night 52°
Precipitation 96 %
Wind 6 mph

Lowell Weather Forecast Updated

41 minutes ago
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
29 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.61 µg/m³
PM10 2.48 µg/m³
O3 0.032 ppm
NO2 1.4 ppb
SO2 0.1 ppb
CO 0.15 ppm
NH3 0.04 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.51.61 µg/m³
PM102.48 µg/m³
O362.35 µg/m³
NO22.59 µg/m³
SO20.35 µg/m³
CO175.12 µg/m³
NH30.04 µg/m³
NO0 µg/m³