Hourly Weather | Today Friday, September 18, 2026
Active Weather Warnings
Clarksville, Tennessee
1 PM
Sunny with a Chance of Thunderstorms
97°
Feels Like 102°
51
Humidity: 39%
UV Index: 6
Wind: 7 mph
2 PM
Cloudy Weather
99°
Feels Like 106°
47
Humidity: 36%
UV Index: 6
Wind: 7 mph
3 PM
Cloudy Weather
100°
Feels Like 106°
47
Humidity: 34%
UV Index: 4
Wind: 7 mph
4 PM
Sunny with a Chance of Thunderstorms
99°
Feels Like 100°
51
Humidity: 37%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
97°
Feels Like 99°
39
Humidity: 40%
UV Index: 2
Wind: 6 mph
6 PM
Cloudy Weather
93°
Feels Like 97°
33
Humidity: 44%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Night
90°
Feels Like 91°
36
Humidity: 50%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
88°
Feels Like 90°
47
Humidity: 58%
UV Index: 0
Wind: 5 mph
9 PM
Stormy Weather
84°
Feels Like 86°
51
Humidity: 66%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
81°
Feels Like 86°
47
Humidity: 71%
UV Index: 0
Wind: 4 mph
11 PM
Cloudy Night
79°
Feels Like 84°
34
Humidity: 77%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 5.21 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

2 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.61 µg/m³
  • PM10: 5.13 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.48 µg/m³
  • PM10: 4.97 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.39 µg/m³
  • PM10: 4.87 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

5 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.47 µg/m³
  • PM10: 4.96 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

6 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.63 µg/m³
  • PM10: 5.14 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

7 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.76 µg/m³
  • PM10: 5.29 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

8 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.84 µg/m³
  • PM10: 5.38 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

9 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.97 µg/m³
  • PM10: 5.52 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.13 µg/m³
  • PM10: 5.69 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 PM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.21 µg/m³
  • PM10: 5.78 µg/m³
  • O3: 0.024 ppm
  • NO2: 1.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Clarksville

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 17 at 9:51PM CDT until September 20 at 7:00PM CDT by NWS Nashville TN
Sep 17, 9:51 PM Sep 20, 7:00 PM
WHAT: Heat index values up to 108 expected.

WHERE: Across Middle Tennessee.

WHEN: Until 7 PM CDT Sunday.

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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Updated: Sep 18, 11:40 AM Source: NWS Alert