Today | Weather | Wednesday, March 18, 2026

Weather in Hamilton, Ohio

03:07 AM
Now
Cloudy Weather
21° F
Feels Like 19°
Precipitation 9 %
Wind 6 mph
Humidity 70 %
Today
Snowy Weather
Day 43°
Night 32°
Precipitation 58 %
Wind 9 mph
UV Index (0 - 11+) 1
Overnight Frost 3 AM – 3 AM

Hamilton Weather Forecast Updated

46 minutes ago
Last updated on

Air Quality in Hamilton

NOW
42 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.03 µg/m³
PM10 3.67 µg/m³
O3 0.045 ppm
NO2 2.3 ppb
SO2 0.8 ppb
CO 0.15 ppm
NH3 1.51 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)
PM2.53.03 µg/m³
PM103.67 µg/m³
O388.88 µg/m³
NO24.32 µg/m³
SO22.05 µg/m³
CO171.76 µg/m³
NH31.51 µg/m³
NO0 µg/m³