You’re landing in Ezeiza, the sun is blazing, and you’ve basically stepped into a sauna. That’s January in Buenos Aires for you. If you’ve been refreshing the buenos aires 10 day weather forecast hoping for a cool breeze, honestly, you might want to temper those expectations. This city doesn't do "mild" in the summer; it does "intensity."
Right now, we are looking at a classic humid subtropical stretch. As of January 14, 2026, the current conditions are sitting at a sweltering 31°C (about 87°F). But it’s not just the heat. It’s the humedad. That thick, heavy air that makes a short walk to a Parrilla feel like a marathon.
The Reality of the Buenos Aires 10 Day Weather Forecast
Let’s get into the weeds of the next week and a half. The forecast is showing a tug-of-war between high-pressure heatwaves and sudden, dramatic shifts from the south.
Typically, you’ll see daytime highs hovering between 29°C and 32°C. But here is what the automated apps often miss: the "Sudestada." These are winds from the southeast that can suddenly drop the temperature by ten degrees in an hour, usually accompanied by a sky that looks like a bruised plum.
For the next few days, expect plenty of sunshine—about 9 hours of it daily. However, the Servicio Meteorológico Nacional (SMN) is tracking an entry of cold air from the south. This is the "alivio" (relief) every Porteño is praying for. By Friday, January 16, we might see a dip to a much more manageable 18°C as a minimum, thanks to a moderate southern wind.
🔗 Read more: Downtown Asheville Vacation Rentals: Why You’re Probably Looking in the Wrong Place
If you are planning your week, keep this in mind:
- Wednesday & Thursday: Hot. Like, really hot. Highs near 31°C with an extreme UV index.
- Friday: The break. Cloudier skies and a noticeable drop in mercury.
- The Weekend: Mostly clear and "comfortable," which in BA means mid-20s Celsius.
- Next Week: The heat starts creeping back up toward that 30°C mark.
Why Everyone Underestimates the UV Index
People come here and think, "Oh, 30 degrees, I’ve handled that in Miami or Madrid." It’s different here. The UV index is currently hitting 11+ (Extreme). You will burn in fifteen minutes if you aren't careful.
I’ve seen tourists trying to do the full Recoleta Cemetery tour at 2 PM. Don't be that person. The locals—the ones who know what's up—disappear between 1 PM and 4 PM. They are inside with the AC cranked or sitting in the deep shade of the jacaranda trees in Palermo.
Surviving the Steam
If the buenos aires 10 day weather forecast stays as sunny as predicted, you need a strategy. This isn't just about water; it's about timing.
Go to the parks early. Parque Tres de Febrero is a godsend in the morning. The rose garden (El Rosedal) is beautiful, but by noon, it’s a frying pan. If you’re stuck in the city heat, head to Parque Norte. It’s basically a massive complex of pools and sports fields right by the river. It’s where the city goes to cool off when the pavement starts radiating heat.
Also, watch out for the storms. January sees about 8 to 9 days of rain on average. These aren't all-day drizzles. They are "the sky is falling" thunderstorms that flood the corners of Santa Fe Avenue for twenty minutes and then vanish, leaving the air even steamier than before.
✨ Don't miss: How Far is Tucson From Yuma? What Most People Get Wrong About the Arizona Desert Drive
What to Actually Pack
Forget the heavy denim. You’ll regret it the second you leave the airport.
- Linen everything.
- A high-quality hat. (Not a joke, the sun is aggressive).
- A light windbreaker. Why? Because when that southern wind hits on Friday, or when you step into a shopping mall where the AC is set to "Arctic," you’ll be shivering.
The buenos aires 10 day weather forecast suggests a mix of sweltering peaks and a few days of much-needed ventilation. Stay hydrated, eat your steak late at night when the air finally moves, and always, always carry sunscreen.
📖 Related: What is the Biggest Bridge in America? What Most People Get Wrong
To make the most of this window, schedule your outdoor walking tours for the upcoming Friday or Saturday when the southern winds provide that brief temperature dip. If you’re hitting the streets during the mid-week heat, keep your itinerary focused on indoor museums like MALBA or the Museo Nacional de Bellas Artes during the 12 PM to 4 PM peak.