April 21 is statistically one of the best days of the year in El Hierro. With minimal rain risk (3%) and pleasant highs of 17°C, it's ideal for outdoor adventures. You'll enjoy El Hierro with reasonable crowd levels and competitive accommodation options.
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Essential Travel Info for El Hierro
Currency
EUR
€ Euro
Language
Spanish
+3 more
Driving
Right side
Connect
Mobile coverage on El Hierro is not on p...
Safety
High Safety
GPI: 1.603
El Hierro Weather Forecast for April 21
"Mild & Comfortable. Expect average highs of 17°C. 3% chance of rain."
What to Wear in El Hierro in April
Based on historical data for April 21, El Hierro typically experiences temperatures between 12.9°C and 17°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (3% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for El Hierro
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17°C
Daytime Peak
Average Low
12.9°C
Nighttime Low
Feels Like
17°C
🌤️ Feels accurate
Rain Chance
3%
Avg 0.1mm if it rains
Cloud Cover
40%
Overcast
Pressure
1018.1 hPa
Low volatility
El Hierro Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
07:00 - 10:00
16:00 - 20:00
Type I-II
🔴 13 min to burn
Type III-IV
🟡 20 min to burn
Type V-VI
🟢 33 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
11.9°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Spain
Flight Traffic
Moderate
55/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~6
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in El Hierro
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:42
☀️ Noon
14:11
🌇 Sunset
20:41
⏱️ Daylight
12h 58m
Wind Speed
29.7 km/h
Fresh breeze
Sunshine
11.8 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for El Hierro
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 El Hierro
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
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.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, El Hierro on April 21 averages 17°C with a 3% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
El Hierro 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
17.8°C • 3% rain
Score
92
April 15
17.9°C • 4% rain
Score
92
April 16
17.8°C • 4% rain
Score
91
💡 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 El Hierro Worth Visiting on April 21?
Planning a trip to El Hierro on April 21? 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°C with a 3% historical precipitation risk.
✈️ Travel Logistics: Approximately 6 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Spain, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 21.2°C (swimming pool). Wave conditions are generally surfers only with heights around 1.7m.
📊 Historical Extremes: The hottest April 21 recorded in the last 30 years saw temperatures hit 20°C in 2024, while the coldest dropped to 11.1°C in 2018.