Atlanta is starting Sunday, September 20, with clear skies and temperatures around 72 degrees, but the day is headed for another hot finish, according to National Weather Service Peachtree City. Mostly sunny conditions will push the high near 91, with the heat index reaching the upper 90s. Any early fog should be brief, giving way to a bright and steamy afternoon.
Mostly Sunny Sunday With A Small Storm Chance
Rain chances remain low Sunday, at about 10% to 15%, though an isolated shower or thunderstorm cannot be ruled out. East winds will generally stay light at 5 mph or less, and the best stretch for outdoor plans should come before late-afternoon heat peaks.
The National Weather Service’s Atlanta/Peachtree City office says the region remains unusually warm for mid-September, with Sunday and Monday bringing the week’s highest heat-index values. The office also notes that no watches, warnings or advisories are in effect for Atlanta, according to National Weather Service Peachtree City.
Storm Chances Rise Monday Through Wednesday
Preparing Homes for Extreme Heat
For residents looking for ways to prepare as temperatures and heat indexes approach the upper 90s, the Fulton County Department of Real Estate and Asset Management’s Weather-Ready Homes Guide offers practical home-preparation measures for severe weather, including extreme heat.
Monday, September 21, will be another hot day, with sunshine early, a high near 92 and a heat index as high as 97. A slight chance of showers and thunderstorms arrives after 3 p.m., increasing to about 40% Monday night.
Rain chances climb to 50% Tuesday and Wednesday as temperatures ease from around 90 Tuesday to 82 Wednesday. Forecasters are monitoring the possibility of stronger storms, with damaging wind gusts the main concern Sunday evening and additional severe-weather potential possible early in the week.
Cooler Weather Finally Moves In Late Week
The forecast takes a distinctly more comfortable turn Thursday, when Atlanta should see a partly sunny high near 79 and an overnight low around 62. Friday and Saturday stay mostly sunny, with highs near 79 and 80 and lower rain chances.
That late-week cooldown may feel like a small preview of fall after several days in the 90s. For now, Sunday’s message is simple: enjoy the sunshine, plan around the afternoon heat and keep an eye on the sky Monday through Wednesday.
