Historical data suggests significant rain risk (71%) on December 4. If you seek sun, consider a different date. Bring rain gear! You'll find plenty of company in Sumba this month as tourism activity remains quite robust.
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Essential Travel Info for Sumba
Currency
IDR
Rp Indonesian rupiah
Language
Indonesian
Driving
Left side
Connect
Since Sumba is far from other major citi...
Safety
High Safety
GPI: 1.8
Sumba Weather Forecast for December 4
"Rainy & Overcast. Expect average highs of 30.9°C. 71% chance of rain."
What to Wear in Sumba in December
Based on historical data for December 4, Sumba typically experiences temperatures between 25.2°C and 30.9°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 71% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Sumba
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
30.9°C
Daytime Peak
Average Low
25.2°C
Nighttime Low
Feels Like
41.6°C
🔥 Heat index effect
Rain Chance
71%
Avg 7.9mm if it rains
Cloud Cover
81%
Moderate rain
Pressure
1008.9 hPa
Low volatility
Sumba Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 96% 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
🔴 16 min to burn
Type III-IV
🟡 24 min to burn
Type V-VI
🟢 40 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
27.7°C
Humid/Sticky
Heat Index
41.6°C
Feels hotter
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Indonesia
Flight Traffic
Busy
67/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~6
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sumba
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:30
☀️ Noon
11:50
🌇 Sunset
18:09
⏱️ Daylight
12h 39m
Wind Speed
10.7 km/h
Light breeze
Sunshine
10.5 hrs
Direct Sun (Cloud-free)
Humidity
83%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sumba
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 Sumba
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Sumba on December 4 averages 30.9°C with a 71% precipitation probability. Wedding/Outdoor Event Score: 54/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Sumba Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 6
31°C • 64% rain
Score
61
December 7
31°C • 67% rain
Score
60
December 10
30.9°C • 66% rain
Score
60
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 4) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sumba Worth Visiting on December 4?
Planning a trip to Sumba on December 4? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 30.9°C with a 71% historical precipitation risk.
✈️ Travel Logistics: Approximately 6 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 11 vaccinations are recommended for Indonesia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 30.4°C (hot soup). Wave conditions are generally lake-like with heights around 0.12m.
📊 Historical Extremes: The hottest December 4 recorded in the last 30 years saw temperatures hit 32.3°C in 2024, while the coldest dropped to 23.8°C in 2022.