Today | Weather | Tuesday, September 1, 2026
Active Weather Warnings

Weather in Hamilton, Ohio

11:24 AM
Now
Sunny Weather
84° F
Feels Like 95°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5
Humidity 66 %
Today
Hot Day
Day 97°
Night 68°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 7

Hamilton Weather Forecast Updated

32 minutes ago
Last updated on

Air Quality in Hamilton

NOW
25 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.99 µg/m³
PM10 6.84 µg/m³
O3 0.024 ppm
NO2 2.2 ppb
SO2 0.4 ppb
CO 0.13 ppm
NH3 1.32 µg/m³
NO 1.54 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)
PM2.55.99 µg/m³
PM106.84 µg/m³
O348.08 µg/m³
NO24.11 µg/m³
SO21.14 µg/m³
CO147.8 µg/m³
NH31.32 µg/m³
NO1.54 µg/m³

Weather Alerts and Warnings for Hamilton

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 1 at 8:35AM EDT until September 3 at 8:00PM EDT by NWS Wilmington OH
Sep 1, 2:00 PM Sep 3, 8:00 PM
WHAT: Heat index values up to 102 expected.

WHERE: Portions of east central and southeast Indiana, northeast
and northern Kentucky, and central, south central, southwest, and
west central Ohio.

WHEN: From 2 PM this afternoon to 8 PM EDT Thursday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Sep 1, 10:51 AM Source: NWS Alert