Today | Weather | Wednesday, March 18, 2026

Weather in Brockton, Massachusetts

03:20 AM
Now
Night
27° F
Feels Like 18°
Precipitation 0 %
Wind 9 mph
Humidity 49 %
Today
Cloudy Weather
Day 37°
Night 19°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5
Overnight Frost 12 AM – 1 AM
Tomorrow Morning Frost 12 AM – 8 AM

Brockton Weather Forecast Updated

24 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Cloudy Weather

Day

50°

Night

32°

Wind

12 mph

UV Index

5

Precipitation

0 %

Air Quality in Brockton

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.51 µg/m³
PM10 0.94 µg/m³
O3 0.051 ppm
NO2 1.1 ppb
SO2 0.3 ppb
CO 0.14 ppm
NH3 0.2 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)
PM2.50.51 µg/m³
PM100.94 µg/m³
O3101.09 µg/m³
NO22.15 µg/m³
SO20.68 µg/m³
CO159.69 µg/m³
NH30.2 µg/m³
NO0 µg/m³