Atlanta weather is basically a mood ring. One morning you're scraping frost off the windshield in 32°F air, and by Tuesday afternoon, you're wondering if a light jacket was a mistake because the high hit 40°F. Honestly, if you're looking for a free 15 day weather forecast Atlanta Georgia, you have to look past the simple icons on your phone.
The city is currently sitting in the middle of a classic Georgia winter squeeze. Right now, on Sunday, January 18, 2026, it's 32°F out there. It feels like 23°F because the wind is kicking up at 9 mph from the northwest. There’s a tiny bit of snow in the air—about a 19% chance—but don't go buying out the milk and bread just yet.
The Next Two Weeks in the A
People always ask if it's going to stay this cold. The short answer? Kinda.
For the next few days, the free 15 day weather forecast Atlanta Georgia shows a pretty consistent pattern of chilly sun. Monday (January 19) is looking bright with a high of 43°F. It’s going to be breezy, though. Expect northwest winds around 13 mph. By Tuesday, the mercury dips a bit further to a high of 40°F, and the overnight low is going to be a bone-chilling 25°F.
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Then things get weird. By Wednesday, January 21, the clouds roll back in. We’re looking at a high of 49°F, but the night brings a 35% chance of actual rain. Not snow. Rain.
Breaking Down the Daily Vibes
Instead of just looking at a chart, think about your layers.
- Early Week (Jan 18-20): It's sunny but deceptive. Highs in the low 40s. Northwest winds mean you’ll want a windbreaker over that hoodie.
- Mid-Week Shift (Jan 21-23): Temperatures start climbing. We’re talking 49°F, then 52°F, then maybe even 55°F on Friday.
- The Weekend (Jan 24-25): Saturday might hit 56°F. It sounds nice, but there’s a 35% chance of rain during the day. Sunday cools back down to 42°F.
Humidity is also hovering around 57% today, but it’ll jump to 88% by next Monday (January 26). When the humidity spikes like that in the winter, the "damp cold" starts to sink into your bones. It’s a different kind of chill than the dry air we’re having right now.
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Why the Forecast Keeps Changing
Forecasts are just educated guesses based on models like the GFS (Global Forecast System) and the European model (ECMWF). In Atlanta, we’re influenced by the "wedge." That’s when cold air gets trapped against the Appalachian Mountains and spills down into the Piedmont. It’s why one part of North Georgia can be freezing while the airport is just drizzly.
Historical data for January usually puts our average high around 54°F. We’re running a bit below that right now. Most experts, including the folks at the National Weather Service in Peachtree City, watch these northwest wind patterns closely. If that wind stays strong, the clouds stay away, but the heat does too.
How to Use This Info
If you’ve got plans at Piedmont Park or you’re heading to a Hawks game, pay attention to the sunset. Today, the sun goes down at 5:55 PM. Once it’s gone, the temperature drops fast. We're looking at a low of 29°F tonight.
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Basically, keep an eye on the 21st. That's when the "sunny and dry" phase ends and the "cloudy and wet" phase begins.
Pro Tip: Don't just trust the high temperature. Check the "feels like." When the wind is 13 mph and it’s 39°F outside, your body thinks it’s closer to freezing.
Grab your heavy coat for the commute tomorrow morning. You’re definitely going to need it when that 27°F low hits before sunrise on Monday. Stay warm, watch for those slick spots on the 26th when the rain chance hits 45%, and maybe keep an umbrella in the trunk just in case.