Hourly Weather Forecast for Johns Creek, Georgia

Hourly Weather | Today › Wednesday, March 18, 2026

Active Weather Warnings

Freeze Warning

Johns Creek, Georgia

10 AM

37°

Feels Like 45°

Humidity: 48%

UV Index: 3

Wind: 5 mph

11 AM

43°

Feels Like 52°

Humidity: 38%

UV Index: 4

Wind: 5 mph

12 PM

45°

Feels Like 57°

Humidity: 33%

UV Index: 6

Wind: 4 mph

1 PM

48°

Feels Like 63°

Humidity: 31%

UV Index: 6

Wind: 4 mph

2 PM

50°

Feels Like 64°

Humidity: 29%

UV Index: 6

Wind: 2 mph

3 PM

52°

Feels Like 63°

Humidity: 28%

UV Index: 4

Wind: 4 mph

4 PM

54°

Feels Like 59°

Humidity: 28%

UV Index: 3

Wind: 5 mph

5 PM

54°

Feels Like 55°

Humidity: 29%

UV Index: 2

Wind: 5 mph

6 PM

54°

Feels Like 55°

Humidity: 30%

UV Index: 1

Wind: 5 mph

7 PM

52°

Feels Like 52°

Humidity: 36%

UV Index: 0

Wind: 4 mph

8 PM

50°

Feels Like 50°

Humidity: 43%

UV Index: 0

Wind: 4 mph

9 PM

46°

Feels Like 46°

Humidity: 48%

UV Index: 0

Wind: 4 mph

10 PM

45°

Feels Like 45°

Humidity: 53%

UV Index: 0

Wind: 5 mph

11 PM

43°

Feels Like 41°

Humidity: 59%

UV Index: 0

Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM

40 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.26 µg/m³
PM₁₀: 9.65 µg/m³
O₃: 0.043 ppm
NO₂: 4.7 ppb
SO₂: 1.2 ppb
CO: 0.15 ppm

Health Recommendations:

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

11 AM

41 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.92 µg/m³
PM₁₀: 9.18 µg/m³
O₃: 0.044 ppm
NO₂: 4.2 ppb
SO₂: 1.3 ppb
CO: 0.15 ppm

Health Recommendations:

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

12 PM

50 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.96 µg/m³
PM₁₀: 5.96 µg/m³
O₃: 0.054 ppm
NO₂: 2.1 ppb
SO₂: 1.4 ppb
CO: 0.14 ppm

Health Recommendations:

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

1 PM

60 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.48 µg/m³
PM₁₀: 5.07 µg/m³
O₃: 0.057 ppm
NO₂: 1.4 ppb
SO₂: 1.3 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

65 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.86 µg/m³
PM₁₀: 5.45 µg/m³
O₃: 0.059 ppm
NO₂: 1.2 ppb
SO₂: 1.3 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.

3 PM

73 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.77 µg/m³
PM₁₀: 5.3 µg/m³
O₃: 0.061 ppm
NO₂: 0.9 ppb
SO₂: 1.2 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.

4 PM

77 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.99 µg/m³
PM₁₀: 4.39 µg/m³
O₃: 0.063 ppm
NO₂: 0.7 ppb
SO₂: 1 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

77 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.8 µg/m³
PM₁₀: 4.21 µg/m³
O₃: 0.063 ppm
NO₂: 0.7 ppb
SO₂: 0.9 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

64 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.95 µg/m³
PM₁₀: 4.91 µg/m³
O₃: 0.059 ppm
NO₂: 1.3 ppb
SO₂: 0.9 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.

7 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.2 µg/m³
PM₁₀: 6.01 µg/m³
O₃: 0.051 ppm
NO₂: 2.5 ppb
SO₂: 0.7 ppb
CO: 0.14 ppm

Health Recommendations:

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

8 PM

42 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.44 µg/m³
PM₁₀: 6.84 µg/m³
O₃: 0.045 ppm
NO₂: 3.7 ppb
SO₂: 0.6 ppb
CO: 0.15 ppm

Health Recommendations:

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

9 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.66 µg/m³
PM₁₀: 7.44 µg/m³
O₃: 0.041 ppm
NO₂: 4.4 ppb
SO₂: 0.5 ppb
CO: 0.16 ppm

Health Recommendations:

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

10 PM

35 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.89 µg/m³
PM₁₀: 8.01 µg/m³
O₃: 0.037 ppm
NO₂: 4.6 ppb
SO₂: 0.4 ppb
CO: 0.16 ppm

Health Recommendations:

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

11 PM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 4.1 µg/m³
PM₁₀: 8.52 µg/m³
O₃: 0.035 ppm
NO₂: 4.6 ppb
SO₂: 0.4 ppb
CO: 0.17 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 Johns Creek

Moderate Expected Likely

Freeze Warning

Freeze Warning issued March 17 at 8:57PM EDT until March 18 at 10:00AM EDT by NWS Peachtree City GA

Mar 17, 11:00 PM → Mar 18, 10:00 AM

WHAT: Sub-freezing temperatures as low as 22 expected.

WHERE: Portions of central, east central, north central,
northeast, northwest, southeast, and west central Georgia.

WHEN: Until 10 AM EDT Wednesday.

IMPACTS: Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.

+ Read More

Take steps now to protect tender plants from the cold. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly.

Updated: Mar 18, 8:51 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Johns Creek

Freeze Warning

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