Today | Weather | Friday, May 22, 2026

Weather in Lewiston, Maine

07:13 AM
Now
Sunny Weather
39° F
Feels Like 37°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 77 %
Today
Cloudy Weather
Day 68°
Night 39°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Lewiston Weather Forecast Updated

28 minutes ago
Last updated on

Air Quality in Lewiston

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.86 µg/m³
PM10 1.21 µg/m³
O3 0.032 ppm
NO2 1.6 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0.71 µg/m³
NO 0.27 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)
PM2.50.86 µg/m³
PM101.21 µg/m³
O362.84 µg/m³
NO22.92 µg/m³
SO20.49 µg/m³
CO127.88 µg/m³
NH30.71 µg/m³
NO0.27 µg/m³