Today | Weather | Wednesday, October 22, 2025

Weather in Hamilton, Ohio

12:34 AM
Now
Cloudy Night
48° F
Feels Like 43°
Precipitation 6 %
Wind 8 mph
Humidity 67 %
Today
Cloudy Weather
Day 55°
Night 37°
Precipitation 14 %
Wind 14 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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.

Hamilton Weather Forecast Updated

Air Quality in Hamilton

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.27 µg/m³
PM10 1.82 µg/m³
O3 0.036 ppm
NO2 1.9 ppb
SO2 1 ppb
CO 0.10 ppm
NH3 1.49 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)
PM2.51.27 µg/m³
PM101.82 µg/m³
O371.62 µg/m³
NO23.64 µg/m³
SO22.71 µg/m³
CO115.99 µg/m³
NH31.49 µg/m³
NO0 µg/m³