Today | Weather | Wednesday, September 23, 2026

Weather in Lowell, Massachusetts

09:29 AM
Now
Cloudy Weather
50° F
Feels Like 48°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 2
Humidity 88 %
Today
Cloudy Weather
Day 66°
Night 41°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 5

Lowell Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 23, 2025)
Rainy Weather

Day

81°

Night

63°

Wind

5 mph

Precipitation

96 %

Air Quality in Lowell

NOW
22 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.1 µg/m³
PM10 2.38 µg/m³
O3 0.023 ppm
NO2 2.3 ppb
SO2 0.4 ppb
CO 0.17 ppm
NH3 0.11 µg/m³
NO 0.56 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)
PM2.51.1 µg/m³
PM102.38 µg/m³
O345.76 µg/m³
NO24.38 µg/m³
SO21.03 µg/m³
CO198.49 µg/m³
NH30.11 µg/m³
NO0.56 µg/m³