Today | Weather | Tuesday, April 7, 2026

Weather in Portland, Maine

09:46 AM
Now
Snowy Weather
36° F
Feels Like 30°
Precipitation 59 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 68 %
Today
Snowy Weather
Day 37°
Night 28°
Precipitation 92 %
Wind 9 mph
UV Index (0 - 11+) 2
Overnight Frost 5 AM – 6 AM

Portland Weather Forecast Updated

4 minutes ago
Last updated on

Air Quality in Portland

NOW
39 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.16 µg/m³
PM10 3.25 µg/m³
O3 0.042 ppm
NO2 8.5 ppb
SO2 0.8 ppb
CO 0.18 ppm
NH3 0.35 µg/m³
NO 1.01 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)
PM2.52.16 µg/m³
PM103.25 µg/m³
O382.67 µg/m³
NO216.04 µg/m³
SO22.07 µg/m³
CO209.62 µg/m³
NH30.35 µg/m³
NO1.01 µg/m³