January 21 is generally a great time to visit Buenos Aires. While there is a slight chance of rain (17%), showers are usually brief. Expect comfortable 28°C weather. Expect a bustling atmosphere in Buenos Aires right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Buenos Aires
Currency
ARS
$ Argentine peso
Language
Guaraní
+1 more
Driving
Right side
Connect
Cafés and restaurants commonly offer cus...
Safety
High Safety
GPI: 1.911
Buenos Aires Weather Forecast for January 21
"Warm & Sunny. Expect average highs of 28.1°C. 17% chance of rain."
What to Wear in Buenos Aires in January
Based on historical data for January 21, Buenos Aires typically experiences temperatures between 21.1°C and 28.1°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (17% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Buenos Aires
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
28.1°C
Daytime Peak
Average Low
21.1°C
Nighttime Low
Feels Like
30.6°C
🔥 Feels warmer
Rain Chance
17%
Avg 1mm if it rains
Cloud Cover
37%
Overcast
Pressure
1012.8 hPa
Medium volatility
Buenos Aires Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 100% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
06:00 - 10:00
16:00 - 20:00
Type I-II
🔴 12 min to burn
Type III-IV
🟡 18 min to burn
Type V-VI
🟢 30 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.6°C
Humid/Sticky
Heat Index
30.6°C
Feels hotter
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Argentina
Flight Traffic
High
85/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~115
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Buenos Aires
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:03
☀️ Noon
13:05
🌇 Sunset
20:08
⏱️ Daylight
14h 4m
Wind Speed
23.4 km/h
Moderate wind
Sunshine
11.8 hrs
Direct Sun (Cloud-free)
Humidity
68%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Buenos Aires
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Buenos Aires
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Buenos Aires on January 21 averages 28.1°C with a 17% precipitation probability. Wedding/Outdoor Event Score: 96/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Buenos Aires Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Buenos Aires Worth Visiting on January 21?
Planning a trip to Buenos Aires on January 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.1°C with a 17% historical precipitation risk.
✈️ Travel Logistics: Approximately 115 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Argentina, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26.9°C (tropical bath). Wave conditions are generally fun waves with heights around 0.78m.
📊 Historical Extremes: The hottest January 21 recorded in the last 30 years saw temperatures hit 31.2°C in 2017, while the coldest dropped to 19°C in 2024.