Today | Weather | Monday, September 21, 2026

Weather in Lewiston, Maine

10:09 AM
Now
Cloudy Weather
55° F
Feels Like 57°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 3
Humidity 82 %
Today
Cloudy Weather
Day 66°
Night 43°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 4

Lewiston Weather Forecast Updated

46 minutes ago
Last updated on

Air Quality in Lewiston

NOW
20 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.42 µg/m³
PM10 2 µg/m³
O3 0.022 ppm
NO2 1.7 ppb
SO2 0.2 ppb
CO 0.17 ppm
NH3 0.07 µg/m³
NO 0.95 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)
PM2.51.42 µg/m³
PM102 µg/m³
O343.15 µg/m³
NO23.27 µg/m³
SO20.56 µg/m³
CO197.53 µg/m³
NH30.07 µg/m³
NO0.95 µg/m³