Today | Weather | Tuesday, October 21, 2025

Weather in Worcester, Massachusetts

10:08 PM

Now

50° F

Feels Like 46°

Precipitation 6 %

Wind 7 mph

Humidity 84 %

Today

Day 63°

Night 48°

Precipitation 90 %

Wind 7 mph

Worcester Weather Forecast Updated

27 minutes ago

Last updated on October 21, 2025 9:41 PM

Weather Forecast History

Last Year's Weather on This Day (October 21, 2024)

Day

79°

Night

55°

Wind

6 mph

Precipitation

Air Quality in Worcester

NOW

43 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 5 µg/m³

PM₁₀ 10.66 µg/m³

O₃ 0.046 ppm

NO₂ 1.1 ppb

SO₂ 0.5 ppb

CO 0.10 ppm

NH₃ 0.26 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:

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

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 5 µg/m³

PM₁₀ – 10.66 µg/m³

O₃ – 91.07 µg/m³

NO₂ – 2.14 µg/m³

SO₂ – 1.35 µg/m³

CO – 112.78 µg/m³

NH₃ – 0.26 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast