December 21 is statistically one of the best days of the year in Bariloche. With minimal rain risk (12%) and pleasant highs of 19°C, it's ideal for outdoor adventures. You'll find plenty of company in Bariloche this month as tourism activity remains quite robust.
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Essential Travel Info for Bariloche
Currency
ARS
$ Argentine peso
Language
Guaraní
+1 more
Driving
Right side
Safety
High Safety
GPI: 1.911
Bariloche Weather Forecast for December 21
"Mild & Comfortable. Expect average highs of 18.6°C. 12% chance of snow."
What to Wear in Bariloche in December
Based on historical data for December 21, Bariloche typically experiences temperatures between 7.6°C and 18.6°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (12% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Bariloche
Smart Suitcase
- Light Jacket
- Long Pants
Average High
18.6°C
Daytime Peak
Average Low
7.6°C
Nighttime Low
Feels Like
18.6°C
🌤️ Feels accurate
Snow Chance
12%
Avg 0.5mm if it snows
Snowfall
0.1 cm
~12% chance
Pressure
1014.3 hPa
Low volatility
Bariloche Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
06:00 - 10:00
16:00 - 21:00
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
11.4°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Argentina
Flight Traffic
Busy
66/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~29
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Bariloche
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:10
☀️ Noon
13:44
🌇 Sunset
21:18
⏱️ Daylight
15h 8m
Wind Speed
18 km/h
Gentle breeze
Sunshine
13.2 hrs
Direct Sun (Cloud-free)
Humidity
63%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Bariloche
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Bariloche
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Bariloche on December 21 averages 18.6°C with a 12% precipitation probability. Wedding/Outdoor Event Score: 97/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Bariloche Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 24
20°C • 14% rain
Score
100
December 25
20.6°C • 13% rain
Score
100
December 26
21°C • 12% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Bariloche Worth Visiting on December 21?
Planning a trip to Bariloche on December 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 18.6°C with a 12% historical precipitation risk.
✈️ Travel Logistics: Approximately 29 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Argentina, including COVID-19.
📊 Historical Extremes: The hottest December 21 recorded in the last 30 years saw temperatures hit 26.5°C in 2021, while the coldest dropped to 4.9°C in 2016.