National Weather Service Forecast for: Duluth GA
Issued by: National Weather Service Peachtree City, GA
Updated: 2:26 am EDT Aug 20, 2026
 
Today

Today: A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 104. Calm wind becoming north around 5 mph in the afternoon.
Mostly Sunny
then Slight
Chance
T-storms
 Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm.
Chance
T-storms

 Friday

Friday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Heat index values as high as 101. Calm wind becoming west around 5 mph in the afternoon.
Mostly Sunny
then Chance
T-storms
 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening.
Chance
T-storms then
Chance
Showers
 Saturday

Saturday: Sunny, with a high near 92. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 70.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 92.
Sunny

 Sunday
Night
Sunday Night: Mostly clear, with a low around 68.
Mostly Clear

 Monday

Monday: Sunny, with a high near 91.
Sunny
Hi 97 °F Lo 73 °F Hi 93 °F Lo 71 °F Hi 92 °F Lo 70 °F Hi 92 °F Lo 68 °F Hi 91 °F

 

Today
 
 A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 104. Calm wind becoming north around 5 mph in the afternoon.
Tonight
 
 A 30 percent chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm.
Friday
 
 A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 93. Heat index values as high as 101. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
 
 A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening.
Saturday
 
 Sunny, with a high near 92. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night
 
 Mostly clear, with a low around 70.
Sunday
 
 Sunny, with a high near 92.
Sunday Night
 
 Mostly clear, with a low around 68.
Monday
 
 Sunny, with a high near 91.
Monday Night
 
 Partly cloudy, with a low around 69.
Tuesday
 
 A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.

 

Forecast from NOAA-NWS for Duluth GA.