Today | Weather | Friday, September 4, 2026

Weather in Lowell, Massachusetts

05:46 PM
Now
Cloudy Weather
79° F
Feels Like 79°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 54 %
Today
Cloudy Weather
Day 84°
Night 59°
Precipitation 49 %
Wind 7 mph
UV Index (0 - 11+) 6

Lowell Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 4, 2025)
Rainy Night

Day

82°

Night

61°

Wind

7 mph

Precipitation

93 %

Air Quality in Lowell

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.98 µg/m³
PM10 4.16 µg/m³
O3 0.039 ppm
NO2 1.3 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 0.21 µg/m³
NO 0.27 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)
PM2.53.98 µg/m³
PM104.16 µg/m³
O376.06 µg/m³
NO22.52 µg/m³
SO20.44 µg/m³
CO116.43 µg/m³
NH30.21 µg/m³
NO0.27 µg/m³