Sumba Weather in January
Thinking of visiting Sumba in January? Expect very high temperatures reaching 30°C (86°F) during the day, dropping to 24°C (75°F) at night. Heavy showers are common during the rainy season.
Rainfall in Sumba in January
As part of the rainy season, Sumba sees around 21 days of rain in January, with an average of 283 mm (11 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Sumba in January
January in Sumba brings typical temperatures with highs around 30°C (86°F) and lows of 24°C (75°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.January in Sumba has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Sumba's climate page.
Sumba Temperature in January
Min Temperature
24°C (75°F)
Max Temperature
30°C (86°F)
Chance of Rain
70%
Precipitation
283 mm (11 in)
Rainy days
21 days
Daily Historical Temperatures
49-year average (1976-2026)
Based on our historical records, temperatures in Sumba typically stay consistent throughout January, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in January
Daily Historical Precipitation
49-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Sumba in January
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 January
Our historical data for Sumba spans 2004 to 2025, revealing these weather extremes.
- The hottest January day on record in Sumba reached 39°C (102°F) (January 25, 2005).
- Sumba experienced its chilliest January day on January 31, 2017, reaching only 27°C (81°F).
- Sumba registered its coldest January night on January 6, 2007, with temperatures dropping to 22°C (72°F).
- The wettest January day on record brought 129 mm (5.1 in) of precipitation to Sumba (January 2, 2012).
Best Places in Indonesia in January
Find out more about the weather in Indonesia and which places have the best travel conditions in this month. See all of Indonesia in January →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Sumba in January
Warm but pleasant conditions in Sumba in January. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.What To Do in Sumba in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Sumba's climate page.
See the full Sumba climate overview or explore weather in Indonesia.
