September 21 is statistically one of the best days of the year in Valletta. With minimal rain risk (9%) and pleasant highs of 27°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Valletta right now—this is when the city truly comes alive with visitors. Note: September 21 is Independence Day in Valletta, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Valletta
Currency
EUR
€ Euro
Language
English
+1 more
Driving
Left side
Connect
Many businesses (restaurants, hotels etc...
Valletta Weather Forecast for September 21
"Warm & Sunny. Expect average highs of 26.5°C. 9% chance of rain."
What to Wear in Valletta in September
Based on historical data for September 21, Valletta typically experiences temperatures between 22.7°C and 26.5°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (9% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Valletta
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26.5°C
Daytime Peak
Average Low
22.7°C
Nighttime Low
Feels Like
27.5°C
☀️ Minor difference
Rain Chance
9%
Avg 0.4mm if it rains
Cloud Cover
32%
Overcast
Pressure
1015.8 hPa
Low volatility
Valletta Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 99% 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 - 18:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21°C
Humid/Sticky
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Holiday
Independence Day
Flight Traffic
High
93/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~97
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Valletta
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:50
☀️ Noon
11:56
🌇 Sunset
18:02
⏱️ Daylight
12h 12m
Wind Speed
24.8 km/h
Moderate wind
Sunshine
10.6 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Valletta
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Valletta
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 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, Valletta on September 21 averages 26.5°C with a 9% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Valletta Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 21) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Valletta Worth Visiting on September 21?
Planning a trip to Valletta on September 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 26.5°C with a 9% historical precipitation risk.
🎉 Local Event: The date coincides with Independence Day, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 97 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Malta, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26.2°C (tropical bath). Wave conditions are generally fun waves with heights around 0.88m.
📊 Historical Extremes: The hottest September 21 recorded in the last 30 years saw temperatures hit 32.1°C in 2023, while the coldest dropped to 21.1°C in 2017.