Hourly Weather Forecast for Hamilton, Ohio

Hourly Weather | Today › Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Hamilton, Ohio

12 PM

88°

Feels Like 99°

Humidity: 59%

UV Index: 6

Wind: 8 mph

1 PM

91°

Feels Like 102°

Humidity: 52%

UV Index: 7

Wind: 8 mph

2 PM

93°

Feels Like 102°

Humidity: 48%

UV Index: 6

Wind: 8 mph

3 PM

95°

Feels Like 102°

Humidity: 46%

UV Index: 5

Wind: 8 mph

4 PM

97°

Feels Like 104°

Humidity: 44%

UV Index: 4

Wind: 7 mph

5 PM

93°

Feels Like 100°

Humidity: 47%

UV Index: 2

Wind: 7 mph

6 PM

93°

Feels Like 99°

Humidity: 49%

UV Index: 1

Wind: 7 mph

7 PM

90°

Feels Like 97°

Humidity: 55%

UV Index: 0

Wind: 6 mph

8 PM

88°

Feels Like 93°

Humidity: 63%

UV Index: 0

Wind: 5 mph

9 PM

82°

Feels Like 90°

Humidity: 71%

UV Index: 0

Wind: 5 mph

10 PM

81°

Feels Like 86°

Humidity: 76%

UV Index: 0

Wind: 5 mph

11 PM

79°

Feels Like 82°

Humidity: 82%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

12 PM

43 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.95 µg/m³
PM₁₀: 6.6 µg/m³
O₃: 0.047 ppm
NO₂: 0.9 ppb
SO₂: 1.5 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.63 µg/m³
PM₁₀: 6.12 µg/m³
O₃: 0.051 ppm
NO₂: 0.5 ppb
SO₂: 1 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM

49 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.72 µg/m³
PM₁₀: 6.18 µg/m³
O₃: 0.053 ppm
NO₂: 0.4 ppb
SO₂: 0.8 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM

54 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.92 µg/m³
PM₁₀: 6.38 µg/m³
O₃: 0.055 ppm
NO₂: 0.4 ppb
SO₂: 0.7 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM

56 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.05 µg/m³
PM₁₀: 6.51 µg/m³
O₃: 0.056 ppm
NO₂: 0.5 ppb
SO₂: 0.7 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM

58 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.15 µg/m³
PM₁₀: 6.61 µg/m³
O₃: 0.057 ppm
NO₂: 0.5 ppb
SO₂: 0.7 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM

48 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.4 µg/m³
PM₁₀: 6.89 µg/m³
O₃: 0.052 ppm
NO₂: 1.3 ppb
SO₂: 0.6 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM

40 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.67 µg/m³
PM₁₀: 7.21 µg/m³
O₃: 0.043 ppm
NO₂: 2.7 ppb
SO₂: 0.5 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM

34 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.76 µg/m³
PM₁₀: 7.37 µg/m³
O₃: 0.036 ppm
NO₂: 3.8 ppb
SO₂: 0.5 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM

29 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.71 µg/m³
PM₁₀: 7.35 µg/m³
O₃: 0.032 ppm
NO₂: 4.1 ppb
SO₂: 0.4 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM

28 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 6.66 µg/m³
PM₁₀: 7.32 µg/m³
O₃: 0.030 ppm
NO₂: 4 ppb
SO₂: 0.4 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

28 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 6.65 µg/m³
PM₁₀: 7.34 µg/m³
O₃: 0.029 ppm
NO₂: 4 ppb
SO₂: 0.4 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

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.

+ Read More

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

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Hamilton

Heat Advisory

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