Clarksville, Tennessee Weather:
Active Weather Warnings
Sunday, September 20, 2026
Hot Day
Day 99°
Night 73°
Precipitation 7 %
Wind 7 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 20, 2025)
Rainy Night

Day

91°

Night

66°

Wind

4 mph

Precipitation

80 %

Weather Alerts and Warnings for

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.
+ Read More
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, 1:10 PM Source: NWS Alert