Today | Weather | Tuesday, October 21, 2025

Weather in Worcester, Massachusetts

10:08 PM
Now
Cloudy Night
50° F
Feels Like 46°
Precipitation 6 %
Wind 7 mph
Humidity 84 %
Today
Rainy Night
Day 63°
Night 48°
Precipitation 90 %
Wind 7 mph

Worcester Weather Forecast Updated

27 minutes ago
Last updated on

Weather Forecast History

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

Night

Day

79°

Night

55°

Wind

6 mph

Precipitation

3

Air Quality in Worcester

NOW
43 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 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
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)
PM2.55 µg/m³
PM1010.66 µg/m³
O391.07 µg/m³
NO22.14 µg/m³
SO21.35 µg/m³
CO112.78 µg/m³
NH30.26 µg/m³
NO0 µg/m³