Today | Weather | Monday, October 20, 2025

Weather in Lowell, Massachusetts

06:10 PM

Now

57° F

Feels Like 48°

Precipitation 45 %

Wind 23 mph

Humidity 88 %

Today

Day 64°

Night 48°

Precipitation 100 %

Wind 14 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Lowell Weather Forecast Updated

58 minutes ago

Last updated on October 20, 2025 5:12 PM

Weather Forecast History

Last Year's Weather on This Day (October 20, 2024)

Day

77°

Night

45°

Wind

4 mph

UV Index

Precipitation

Air Quality in Lowell

NOW

26 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 0.92 µg/m³

PM₁₀ 1.47 µg/m³

O₃ 0.028 ppm

NO₂ 3.7 ppb

SO₂ 0.4 ppb

CO 0.12 ppm

NH₃ 0.23 µg/m³

NO 0.11 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:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 0.92 µg/m³

PM₁₀ – 1.47 µg/m³

O₃ – 55.8 µg/m³

NO₂ – 6.92 µg/m³

SO₂ – 0.95 µg/m³

CO – 136.14 µg/m³

NH₃ – 0.23 µg/m³

NO – 0.11 µg/m³

View Hourly Air Quality Forecast