June 20 is generally a great time to visit San Antonio. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 34°C weather. As it's peak season for San Antonio, we recommend booking your stay well in advance to secure the best rates.
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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 June 20
"Warm & Sunny. Expect average highs of 34.1°C. 20% chance of rain."
What to Wear in San Antonio in June
Based on historical data for June 20, San Antonio typically experiences temperatures between 23.9°C and 34.1°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for San Antonio
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
34.1°C
Daytime Peak
Average Low
23.9°C
Nighttime Low
Feels Like
45.6°C
🔥 Heat index effect
Rain Chance
20%
Avg 1.2mm if it rains
Cloud Cover
47%
Light drizzle
Pressure
1013.1 hPa
Low 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 79% 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
🔴 11 min to burn
Type III-IV
🟡 17 min to burn
Type V-VI
🟢 28 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
27.1°C
Humid/Sticky
Heat Index
45.6°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
100/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~163
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Antonio
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:35
☀️ Noon
13:36
🌇 Sunset
20:37
⏱️ Daylight
14h 1m
Wind Speed
18.5 km/h
Gentle breeze
Sunshine
11.7 hrs
Direct Sun (Cloud-free)
Humidity
67%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for San Antonio
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 San Antonio
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very 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
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, San Antonio on June 20 averages 34.1°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— 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
June 16
34.2°C • 14% rain
Score
94
June 17
34.3°C • 14% rain
Score
94
June 23
33.9°C • 19% rain
Score
90
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (June 20) in other destinations
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📍 Is San Antonio Worth Visiting on June 20?
Planning a trip to San Antonio on June 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 34.1°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 163 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest June 20 recorded in the last 30 years saw temperatures hit 40.7°C in 2023, while the coldest dropped to 22.5°C in 2020.