Hourly Weather Forecast for Modesto, California

Hourly Weather | Today › Thursday, October 8, 2026

Active Weather Warnings

Heat Advisory

Modesto, California

7 AM

66°

Feels Like 64°

Humidity: 58%

UV Index: 0

Wind: 5 mph

8 AM

70°

Feels Like 70°

Humidity: 54%

UV Index: 1

Wind: 5 mph

9 AM

73°

Feels Like 75°

Humidity: 43%

UV Index: 2

Wind: 6 mph

10 AM

79°

Feels Like 81°

Humidity: 36%

UV Index: 2

Wind: 6 mph

11 AM

84°

Feels Like 86°

Humidity: 30%

UV Index: 3

Wind: 7 mph

12 PM

88°

Feels Like 91°

Humidity: 25%

UV Index: 4

Wind: 7 mph

1 PM

91°

Feels Like 93°

Humidity: 21%

UV Index: 4

Wind: 8 mph

2 PM

93°

Feels Like 97°

Humidity: 19%

UV Index: 4

Wind: 8 mph

3 PM

97°

Feels Like 97°

Humidity: 17%

UV Index: 3

Wind: 9 mph

4 PM

99°

Feels Like 99°

Humidity: 16%

UV Index: 2

Wind: 9 mph

5 PM

97°

Feels Like 95°

Humidity: 17%

UV Index: 2

Wind: 9 mph

6 PM

93°

Feels Like 91°

Humidity: 19%

UV Index: 1

Wind: 9 mph

7 PM

90°

Feels Like 88°

Humidity: 23%

UV Index: 0

Wind: 8 mph

8 PM

86°

Feels Like 84°

Humidity: 28%

UV Index: 0

Wind: 6 mph

9 PM

82°

Feels Like 81°

Humidity: 32%

UV Index: 0

Wind: 6 mph

10 PM

81°

Feels Like 77°

Humidity: 36%

UV Index: 0

Wind: 6 mph

11 PM

77°

Feels Like 75°

Humidity: 40%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 AM

45 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.81 µg/m³
PM₁₀: 20.8 µg/m³
O₃: 0.032 ppm
NO₂: 3.6 ppb
SO₂: 0.6 ppb
CO: 0.15 ppm

Health Recommendations:

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

8 AM

45 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.89 µg/m³
PM₁₀: 20.95 µg/m³
O₃: 0.030 ppm
NO₂: 4.9 ppb
SO₂: 0.6 ppb
CO: 0.16 ppm

Health Recommendations:

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

9 AM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.96 µg/m³
PM₁₀: 20.98 µg/m³
O₃: 0.028 ppm
NO₂: 5.5 ppb
SO₂: 0.6 ppb
CO: 0.17 ppm

Health Recommendations:

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

10 AM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.11 µg/m³
PM₁₀: 21.02 µg/m³
O₃: 0.028 ppm
NO₂: 5 ppb
SO₂: 0.6 ppb
CO: 0.18 ppm

Health Recommendations:

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

11 AM

49 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 11.72 µg/m³
PM₁₀: 21.55 µg/m³
O₃: 0.032 ppm
NO₂: 4.4 ppb
SO₂: 0.5 ppb
CO: 0.18 ppm

Health Recommendations:

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

12 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 11.06 µg/m³
PM₁₀: 19.52 µg/m³
O₃: 0.051 ppm
NO₂: 2.1 ppb
SO₂: 0.8 ppb
CO: 0.14 ppm

Health Recommendations:

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

1 PM

62 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 12.59 µg/m³
PM₁₀: 20.34 µg/m³
O₃: 0.058 ppm
NO₂: 1.2 ppb
SO₂: 0.7 ppb
CO: 0.13 ppm

Health Recommendations:

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

2 PM

73 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 13.71 µg/m³
PM₁₀: 21.15 µg/m³
O₃: 0.061 ppm
NO₂: 0.8 ppb
SO₂: 0.7 ppb
CO: 0.12 ppm

Health Recommendations:

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

3 PM

84 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 14.04 µg/m³
PM₁₀: 21.29 µg/m³
O₃: 0.065 ppm
NO₂: 0.7 ppb
SO₂: 0.6 ppb
CO: 0.12 ppm

Health Recommendations:

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

4 PM

88 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 14.37 µg/m³
PM₁₀: 21.65 µg/m³
O₃: 0.066 ppm
NO₂: 0.7 ppb
SO₂: 0.6 ppb
CO: 0.12 ppm

Health Recommendations:

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

5 PM

89 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 14.33 µg/m³
PM₁₀: 21.5 µg/m³
O₃: 0.066 ppm
NO₂: 0.8 ppb
SO₂: 0.6 ppb
CO: 0.12 ppm

Health Recommendations:

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

6 PM

74 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 14.54 µg/m³
PM₁₀: 21.87 µg/m³
O₃: 0.062 ppm
NO₂: 1.7 ppb
SO₂: 0.5 ppb
CO: 0.12 ppm

Health Recommendations:

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

7 PM

57 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 15.09 µg/m³
PM₁₀: 22.9 µg/m³
O₃: 0.055 ppm
NO₂: 2.6 ppb
SO₂: 0.5 ppb
CO: 0.14 ppm

Health Recommendations:

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

8 PM

58 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 15.54 µg/m³
PM₁₀: 23.88 µg/m³
O₃: 0.050 ppm
NO₂: 3.1 ppb
SO₂: 0.4 ppb
CO: 0.14 ppm

Health Recommendations:

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

9 PM

58 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 15.62 µg/m³
PM₁₀: 24.28 µg/m³
O₃: 0.046 ppm
NO₂: 3.3 ppb
SO₂: 0.4 ppb
CO: 0.15 ppm

Health Recommendations:

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

10 PM

58 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 15.74 µg/m³
PM₁₀: 24.74 µg/m³
O₃: 0.042 ppm
NO₂: 3.5 ppb
SO₂: 0.4 ppb
CO: 0.15 ppm

Health Recommendations:

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

11 PM

59 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 16.02 µg/m³
PM₁₀: 25.41 µg/m³
O₃: 0.040 ppm
NO₂: 3.8 ppb
SO₂: 0.4 ppb
CO: 0.16 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Modesto

Moderate Expected Likely

Heat Advisory

Heat Advisory issued October 7 at 8:51AM PDT until October 8 at 10:00PM PDT by NWS Sacramento CA

Oct 7, 8:51 AM → Oct 8, 10:00 PM

WHAT: High temperatures of 92 to 101 degrees expected and
overnight low temperatures in the mid 60s to low 70s, with
widespread Moderate HeatRisk and areas of Major HeatRisk.

WHERE: The Sacramento and northern San Joaquin Valleys, Delta and
Carquinez Strait, and foothills.

WHEN: Until 10 PM PDT Thursday.

IMPACTS: Hot temperatures may cause heat illnesses, especially to
anyone without effective cooling and/or adequate hydration.

ADDITIONAL DETAILS: Hottest days expected Today and Thursday.
Temperatures begin a cooling trend on Friday, with Moderate
HeatRisk in the foothill thermal belts and in Sacramento; Minor
HeatRisk elsewhere.

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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: Oct 8, 6:34 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Modesto

Heat Advisory

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