National Weather Service Forecast for: Kingsport TN
Issued by: National Weather Service Morristown, TN
Updated: 2:26 am EDT Jun 30, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 70. Calm wind.
Partly Cloudy

 Tuesday

Tuesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 105. Calm wind.
Mostly Sunny
then Slight
Chance
T-storms
 Tuesday
Night
Tuesday Night: A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 72. Calm wind.
Slight Chance
T-storms then
Mostly Clear
 Wednesday

Wednesday: Sunny and hot, with a high near 98. Heat index values as high as 105. Calm wind.
Hot

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 72. Calm wind.
Mostly Clear

 Thursday

Thursday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Calm wind.
Sunny then
Slight Chance
T-storms
 Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 71. Calm wind.
Slight Chance
T-storms

 Friday

Friday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 98.
Sunny then
Chance
T-storms
 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 71.
Chance
T-storms
Lo 70 °F Hi 94 °F Lo 72 °F Hi 98 °F Lo 72 °F Hi 99 °F Lo 71 °F Hi 98 °F Lo 71 °F

Hazardous Weather Outlook
Heat Advisory
 

Overnight
 
 Partly cloudy, with a low around 70. Calm wind.
Tuesday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 105. Calm wind.
Tuesday Night
 
 A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 72. Calm wind.
Wednesday
 
 Sunny and hot, with a high near 98. Heat index values as high as 105. Calm wind.
Wednesday Night
 
 Mostly clear, with a low around 72. Calm wind.
Thursday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Calm wind.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 71. Calm wind.
Friday
 
 A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 98.
Friday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 71.
Independence Day
 
 A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94.
Saturday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
 
 A 50 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92.
Sunday Night
 
 A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Monday
 
 Showers and thunderstorms likely. Mostly sunny and hot, with a high near 90. Chance of precipitation is 70%.

 

Forecast from NOAA-NWS for Kingsport TN.