December 15 is generally a great time to visit Austin. While there is a slight chance of rain (24%), showers are usually brief. Expect comfortable 18°C weather. Austin is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Austin
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Safety
Moderate Safety
GPI: 2.44
Austin Weather Forecast for December 15
"Mild & Comfortable. Expect average highs of 17.9°C. 24% chance of rain."
What to Wear in Austin in December
Based on historical data for December 15, Austin typically experiences temperatures between 7.9°C and 17.9°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (24% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Austin
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17.9°C
Daytime Peak
Average Low
7.9°C
Nighttime Low
Feels Like
17.9°C
🌤️ Feels accurate
Rain Chance
24%
Avg 0.9mm if it rains
Cloud Cover
48%
Overcast
Pressure
1019.7 hPa
Medium volatility
Austin 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 15 for extended outdoor time
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.1°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 United States
Flight Traffic
High
87/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~328
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Austin
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:21
☀️ Noon
12:27
🌇 Sunset
17:33
⏱️ Daylight
10h 12m
Wind Speed
18.9 km/h
Gentle breeze
Sunshine
6.4 hrs
Direct Sun (Cloud-free)
Humidity
69%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Austin
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Austin
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
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, Austin on December 15 averages 17.9°C with a 24% precipitation probability. Wedding/Outdoor Event Score: 88/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Austin Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 8
17.5°C • 15% rain
Score
95
December 9
17.6°C • 15% rain
Score
94
December 11
17.9°C • 16% rain
Score
90
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 15) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Austin Worth Visiting on December 15?
Planning a trip to Austin on December 15? 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 17.9°C with a 24% historical precipitation risk.
✈️ Travel Logistics: Approximately 328 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest December 15 recorded in the last 30 years saw temperatures hit 26.5°C in 2021, while the coldest dropped to 0.5°C in 2025.