National Weather Service Forecast for: Gainesville GA
Issued by: National Weather Service Peachtree City, GA
Updated: 2:26 am EDT Jul 18, 2026
 
Today

Today: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 100. West wind around 5 mph.
Slight Chance
T-storms
 Tonight

Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 74. Northwest wind around 5 mph.
Slight Chance
T-storms then
Mostly Clear
 Sunday

Sunday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 100. West wind around 5 mph.
Sunny then
Chance
T-storms
 Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening.
Chance
T-storms then
Partly Cloudy
 Monday

Monday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny then
Chance
T-storms
 Monday
Night
Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74.
Chance
T-storms
 Tuesday

Tuesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Mostly Sunny
then Chance
T-storms
 Tuesday
Night
Tuesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.
Chance
T-storms then
Partly Cloudy
 Wednesday

Wednesday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Mostly Sunny
then Chance
T-storms
Hi 92 °F Lo 74 °F Hi 92 °F Lo 73 °F Hi 91 °F Lo 74 °F Hi 91 °F Lo 75 °F Hi 91 °F

Hazardous Weather Outlook
 

Today
 
 A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 100. West wind around 5 mph.
Tonight
 
 A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 74. Northwest wind around 5 mph.
Sunday
 
 A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 100. West wind around 5 mph.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening.
Monday
 
 A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74.
Tuesday
 
 A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Tuesday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.
Wednesday
 
 A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Wednesday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 71.
Thursday
 
 A 20 percent chance of showers. Mostly sunny, with a high near 88.
Thursday Night
 
 A 10 percent chance of showers. Mostly clear, with a low around 71.
Friday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Gainesville GA.