NWS Forecast for McDonough GA

National Weather Service Forecast for: McDonough GA
Issued by: National Weather Service Peachtree City, GA

Updated: 2:26 am EDT Aug 20, 2026

Today Mostly Sunny then Slight Chance T-storms	Tonight Chance T-storms then Chance Showers	Friday Mostly Sunny then Chance T-storms	Friday Night T-storms Likely then Chance Showers	Saturday Sunny	Saturday Night Mostly Clear	Sunday Sunny	Sunday Night Mostly Clear	Monday Sunny
Hi 97 °F	Lo 73 °F	Hi 93 °F	Lo 71 °F	Hi 92 °F	Lo 70 °F	Hi 92 °F	Lo 69 °F	Hi 91 °F

Hazardous Weather Outlook

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 103. Calm wind.
Tonight	A 30 percent chance of showers and thunderstorms, mainly between 1am and 2am. Partly cloudy, with a low around 73. Calm wind.
Friday	A 40 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	Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 71. West wind around 5 mph becoming calm. Chance of precipitation is 60%.
Saturday	Sunny, with a high near 92. Northwest wind around 5 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 69.
Monday	Sunny, with a high near 91.
Monday Night	Partly cloudy, with a low around 70.
Tuesday	A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Tuesday Night	A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Wednesday	A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Forecast from NOAA-NWS for McDonough GA.