National Weather Service Forecast for: Horn Lake MS
Issued by: National Weather Service Memphis, TN
Updated: 12:15 am CDT Jun 30, 2026
 
Overnight

Overnight: Clear, with a low around 75. South southwest wind around 5 mph.
Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind becoming west southwest around 5 mph in the afternoon.
Hot

 Tuesday
Night
Tuesday Night: Clear, with a low around 77. South wind around 5 mph becoming calm.
Clear

 Wednesday

Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 111. Calm wind becoming south around 5 mph in the afternoon.
Hot

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 78. Southeast wind around 5 mph becoming calm in the evening.
Mostly Clear

 Thursday

Thursday: Sunny and hot, with a high near 98. Calm wind becoming south around 5 mph in the afternoon.
Hot

 Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 77. East southeast wind around 5 mph becoming calm in the evening.
Slight Chance
T-storms
 Friday

Friday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunny then
Slight Chance
T-storms
 Friday
Night
Friday Night: Mostly clear, with a low around 77.
Mostly Clear
Lo 75 °F Hi 98 °F Lo 77 °F Hi 99 °F Lo 78 °F Hi 98 °F Lo 77 °F Hi 97 °F Lo 77 °F

Extreme Heat Watch
Heat Advisory
 

Overnight
 
 Clear, with a low around 75. South southwest wind around 5 mph.
Tuesday
 
 Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
 
 Clear, with a low around 77. South wind around 5 mph becoming calm.
Wednesday
 
 Sunny and hot, with a high near 99. Heat index values as high as 111. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 78. Southeast wind around 5 mph becoming calm in the evening.
Thursday
 
 Sunny and hot, with a high near 98. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 77. East southeast wind around 5 mph becoming calm in the evening.
Friday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Calm wind becoming south southeast around 5 mph in the afternoon.
Friday Night
 
 Mostly clear, with a low around 77.
Independence Day
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Sunday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Sunday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Monday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.

 

Forecast from NOAA-NWS for Horn Lake MS.