Today | Weather | Thursday, July 16, 2026

Active Weather Warnings

Air Quality Alert

Weather in Lowell, Massachusetts

10:07 PM

Now

70° F

Feels Like 68°

Precipitation 40 %

Wind 6 mph

Humidity 69 %

Today

Day 90°

Night 61°

Precipitation 55 %

Wind 7 mph

Lowell Weather Forecast Updated

34 minutes ago

Last updated on July 16, 2026 at 9:32 PM

Weather Forecast History

Last Year's Weather on This Day (July 16, 2025)

Day

97°

Night

73°

Wind

6 mph

UV Index

Precipitation

1 %

Air Quality in Lowell

NOW

154 AQI

Unhealthy air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 62.51 µg/m³

PM₁₀ 62.7 µg/m³

O₃ 0.046 ppm

NO₂ 3.2 ppb

SO₂ 0.3 ppb

CO 0.63 ppm

NH₃ 4.04 µg/m³

NO 0 µg/m³

PM_2.5 – 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 62.51 µg/m³

PM₁₀ – 62.7 µg/m³

O₃ – 89.61 µg/m³

NO₂ – 6.02 µg/m³

SO₂ – 0.66 µg/m³

CO – 720.46 µg/m³

NH₃ – 4.04 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lowell

Air Quality Alert

Air Quality Alert issued July 16 at 6:18AM EDT by NWS Boston/Norton MA

Jul 16, 6:18 AM → Jul 17, 12:00 AM

The Massachusetts Department of Environmental Protection has issued
an Air Quality Alert for Fine Particulates, until midnight EDT
tonight.

An Air Quality Alert day means that Fine Particulates concentrations
within the region may approach or exceed levels that are Unhealthy
for Sensitive Groups.

Air is unhealthy for sensitive children and adults, such as those
with asthma, lung or heart disease, and older adults. Sensitive
children and adults should limit prolonged outdoor activity.

For additional information, please visit the Massachusetts
Department of Environmental Protection website at:
https://mass.gov/dep/massair/forecast

Updated: Jul 16, 9:32 PM Source: NWS Alert