January 4 is statistically one of the best days of the year in San Antonio. With minimal rain risk (12%) and pleasant highs of 17°C, it's ideal for outdoor adventures. It's a lively time to explore San Antonio, with most attractions operating at full capacity.
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Essential Travel Info for San Antonio
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
As of Dec 2021, San Antonio has 5G from ...
Safety
Moderate Safety
GPI: 2.44
San Antonio Weather Forecast for January 4
"Mild & Comfortable. Expect average highs of 16.9°C. 12% chance of rain."
What to Wear in San Antonio in January
Based on historical data for January 4, San Antonio typically experiences temperatures between 6.2°C and 16.9°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 San Antonio
Smart Suitcase
- Light Jacket
- Long Pants
Average High
16.9°C
Daytime Peak
Average Low
6.2°C
Nighttime Low
Feels Like
16.9°C
🌤️ Feels accurate
Rain Chance
12%
Avg 0.7mm if it rains
Cloud Cover
50%
Overcast
Pressure
1021.1 hPa
Medium volatility
San Antonio Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 86% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 160 min to burn
Type III-IV
🟡 240 min to burn
Type V-VI
🟢 400 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10°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
Busy
68/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~111
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Antonio
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:30
☀️ Noon
13:40
🌇 Sunset
18:49
⏱️ Daylight
10h 19m
Wind Speed
17 km/h
Gentle breeze
Sunshine
7.0 hrs
Direct Sun (Cloud-free)
Humidity
64%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for San Antonio
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in San Antonio
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.
High pressure may reduce activity.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, San Antonio on January 4 averages 16.9°C with a 12% precipitation probability. Wedding/Outdoor Event Score: 92/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
San Antonio Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 30
18.6°C • 13% rain
Score
98
December 31
17.8°C • 14% rain
Score
96
January 1
17.2°C • 11% rain
Score
94
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 4) in other destinations
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📍 Is San Antonio Worth Visiting on January 4?
Planning a trip to San Antonio on January 4? 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 16.9°C with a 12% historical precipitation risk.
✈️ Travel Logistics: Approximately 111 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest January 4 recorded in the last 30 years saw temperatures hit 23.3°C in 2023, while the coldest dropped to 0.8°C in 2018.