April 21 is generally a great time to visit Austin. While there is a slight chance of rain (22%), showers are usually brief. Expect comfortable 27°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 April 21
"Warm & Sunny. Expect average highs of 26.6°C. 22% chance of rain."
What to Wear in Austin in April
Based on historical data for April 21, Austin typically experiences temperatures between 16.1°C and 26.6°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (22% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Austin
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26.6°C
Daytime Peak
Average Low
16.1°C
Nighttime Low
Feels Like
27.5°C
☀️ Feels accurate
Rain Chance
22%
Avg 1.1mm if it rains
Cloud Cover
57%
Overcast
Pressure
1014.4 hPa
Medium volatility
Austin Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 82% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 17 min to burn
Type III-IV
🟡 26 min to burn
Type V-VI
🟢 43 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20.4°C
Humid/Sticky
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
97/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~364
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Austin
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:58
☀️ Noon
12:30
🌇 Sunset
19:03
⏱️ Daylight
13h 4m
Wind Speed
21.5 km/h
Moderate wind
Sunshine
8.7 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
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Austin
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
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 April 21 averages 26.6°C with a 22% precipitation probability. Wedding/Outdoor Event Score: 96/100."
— 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
April 14
26.2°C • 16% rain
Score
98
April 15
26°C • 19% rain
Score
97
April 16
25.9°C • 19% rain
Score
97
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Austin Worth Visiting on April 21?
Planning a trip to Austin on April 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 26.6°C with a 22% historical precipitation risk.
✈️ Travel Logistics: Approximately 364 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest April 21 recorded in the last 30 years saw temperatures hit 29.6°C in 2022, while the coldest dropped to 6.3°C in 2021.