May 9 is generally a great time to visit San Antonio. While there is a slight chance of rain (28%), showers are usually brief. Expect comfortable 30°C weather. Expect a bustling atmosphere in San Antonio right now—this is when the city truly comes alive with visitors.
View the full calendar
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 May 9
"Warm & Sunny. Expect average highs of 30.1°C. 28% chance of rain."
What to Wear in San Antonio in May
Based on historical data for May 9, San Antonio typically experiences temperatures between 20°C and 30.1°C. We recommend packing t-shirt, light clothing to stay comfortable. With a 28% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for San Antonio
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
30.1°C
Daytime Peak
Average Low
20°C
Nighttime Low
Feels Like
35.8°C
🔥 Heat index effect
Rain Chance
28%
Avg 2.1mm if it rains
Cloud Cover
61%
Overcast
Pressure
1012.1 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 78% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 20:00
Type I-II
🔴 14 min to burn
Type III-IV
🟡 21 min to burn
Type V-VI
🟢 35 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
24.5°C
Humid/Sticky
Heat Index
35.8°C
Feels hotter
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
97/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~158
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Antonio
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:46
☀️ Noon
13:31
🌇 Sunset
20:16
⏱️ Daylight
13h 29m
Wind Speed
21.3 km/h
Moderate wind
Sunshine
9.6 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for San Antonio
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in San Antonio
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
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 May 9 averages 30.1°C with a 28% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— 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
May 12
29.9°C • 23% rain
Score
93
May 3
28.9°C • 32% rain
Score
92
May 11
29.9°C • 26% rain
Score
92
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is San Antonio Worth Visiting on May 9?
Planning a trip to San Antonio on May 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 30.1°C with a 28% historical precipitation risk.
✈️ Travel Logistics: Approximately 158 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest May 9 recorded in the last 30 years saw temperatures hit 38.2°C in 2022, while the coldest dropped to 17.1°C in 2020.