Today | Weather | Tuesday, April 7, 2026

Weather in South Portland, Maine

09:47 AM
Now
Rainy Weather
32° F
Feels Like 28°
Precipitation 53 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 83 %
Today
Snowy Weather
Day 36°
Night 27°
Precipitation 88 %
Wind 9 mph
UV Index (0 - 11+) 2
Overnight Frost 7 AM – 8 AM

South Portland Weather Forecast Updated

Last updated on

Air Quality in South Portland

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.81 µg/m³
PM10 4.46 µg/m³
O3 0.039 ppm
NO2 8.7 ppb
SO2 0.6 ppb
CO 0.20 ppm
NH3 0.43 µg/m³
NO 3.03 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)
PM2.52.81 µg/m³
PM104.46 µg/m³
O376.24 µg/m³
NO216.31 µg/m³
SO21.67 µg/m³
CO233.99 µg/m³
NH30.43 µg/m³
NO3.03 µg/m³