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Sumba Weather in December
Sumba in December sees very high temperatures, with highs around 31°C (88°F) and overnight lows of 24°C (75°F). With the rainy season in full effect, expect around 245 mm (9.6 in) of rainfall and regular showers throughout the month.
Rainfall in Sumba in December
As part of the rainy season, Sumba sees around 18 days of rain in December, with an average of 245 mm (9.6 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Sumba in December
Sumba in December gets highs of 31°C (88°F) during the day and drops to 24°C (75°F) at night. Mornings and evenings are often more comfortable than the peak afternoon hours. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. These are average temperatures, but occasional heat spikes are possible. Stay comfortable by wearing light clothing and drinking water.If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Sumba. Our weather planner can help you explore destinations with more pleasant weather conditions.
Sumba Temperature in December
Min Temperature
24°C (75°F)
Max Temperature
31°C (88°F)
Chance of Rain
59%
Precipitation
245 mm (9.6 in)
Rainy days
18 days
Sumba Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sumba - and find the best time to visit.
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Sumba typically stay consistent throughout December, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in December
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Sumba in December
Browse day-by-day weather records for Sumba spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sumba historical weather extremes in December
According to our 23 years of weather records for Sumba, the following extremes were recorded between 2002 and 2025.
- The hottest December day on record in Sumba reached 36°C (97°F) (December 18, 2002).
- Sumba experienced its chilliest December day on December 10, 2002, reaching only 26°C (79°F).
- The coldest night in December in Sumba was on December 22, 2022, with a minimum of 21°C (70°F).
Best Places in Indonesia in December
Find out more about the weather in Indonesia and which places have the best travel conditions in this month. See all of Indonesia in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Sumba in December
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything!
What To Do in Sumba in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Sumba 3-Day Forecast
More climate data for Sumba
See the full Sumba climate overview or explore weather in Indonesia.
Popular in December
Where to go in December - average daytime high across popular destinations.
Jakarta
31°C (88°F) Yogyakarta30°C (86°F) Sanur29°C (84°F) Kuta29°C (84°F) Seminyak29°C (84°F) Ubud29°C (84°F) Canggu29°C (84°F) Bandung27°C (81°F) Bucket list
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