Clarksville, in northern Tennessee, is bracing for a scorching start to summer, with dangerously high heat indices expected just as the season officially kicks off this Friday, June 21. According to the National Weather Service, the region will enter a heatwave pattern, with humidity levels pushing the “feels-like” temperature well above the actual air temperature.
Hot and humid weekend expected in Clarksville
On Friday, the first official day of summer, temperatures will climb to around 89°F (32°C), setting the stage for a progressive rise into the weekend. By Saturday, the thermometer is projected to hit 92°F (33°C). But with intense atmospheric moisture, the heat index will soar to 105°F (40.5°C). This oppressive mix of heat and humidity will persist through Sunday, when the air temperature is forecast to reach 94°F (34.5°C).
Residents should expect the highest stress on the body between 11 a.m. and 8 p.m., the most intense hours of the heat of the day.
Forecast through Juneteenth: Rain, storms, then sun
Before the weekend’s heat sets in, Clarksville will see tropical-like conditions midweek, with rain and thunderstorms playing a dominant role in the forecast.
Tuesday will be stormy, with an 80% chance of showers and thunderstorms, mostly before 4 p.m. Highs will reach 82°F (28°C) with southerly winds around 5 to 10 mph. Rainfall could total between a quarter to a half inch.
Tuesday night into Wednesday brings a continued chance of storms, especially late, with overnight lows near 72°F (22°C).
Wednesday looks slightly drier, though scattered thunderstorms (40% chance) remain possible. Expect partly sunny skies and a high around 88°F (31°C), with gusty southwest winds up to 20 mph.
Juneteenth (Wednesday night into Thursday) remains unsettled, with a 50% chance of thunderstorms and a high near 84°F (29°C). Skies will gradually clear into the evening, leading to mostly clear and fog-prone conditions overnight, with a low of 68°F (20°C).
Dry, intense heat arrives by Friday
After Thursday’s transitional weather, sunshine returns Friday, and temperatures begin to rise significantly. Friday’s high of 89°F (32°C) will be the calm before the humidity surge, as weekend heat builds in.
Friday night will remain mild and mostly clear, with a low near 70°F (21°C).
Saturday and Sunday will bring clear skies, relentless sun, and rising discomfort. Saturday tops out near 92°F (33°C), while Sunday peaks at 94°F (34.5°C) under sunny skies and stagnant air.
Clarksville should prepare for oppressive heat and poor overnight relief, as nighttime lows stay above 70°F (21°C)—a signature pattern of southern heatwaves.
