Umalas Weather in December
Umalas in December sees high daytime temperatures of 29°C (84°F) and nighttime lows of 25°C (77°F). As part of the rainy season, showers are frequent and often heavy. Budget around 284 mm (11 in) of rainfall for the month.
Rainfall in Umalas in December
Umalas is in the rainy season in December, with rain on around 16 days and an average of 284 mm (11 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Umalas in December
Temperatures in Umalas in December top out at 29°C (84°F) and drop to 25°C (77°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Umalas in December
You can expect a moderate amount of sunlight, with approximately 177 hours. Even though this month is part of the wet season, you can still see the sun occasionally.
Average water temperature in December
With water at 29°C (84°F), conditions are warm and calm. Perfect for those who like tropical water temperatures, though it won't cool you down much.December in Umalas has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options 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 Umalas's climate page.
Umalas Temperature in December
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Water Temperature
29°C (84°F) *
Chance of Rain
52%
Precipitation
284 mm (11 in)
Rainy days
16 days
Humidity
85% *
Sunshine
177 hours *
Percentage Sunshine
43% *
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Umalas typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 26°C (79°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 for Umalas in December
Browse day-by-day weather records for Umalas spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Umalas historical weather extremes in December
According to our 33 years of weather records for Umalas, the following extremes were recorded between 1992 and 2025.
- On December 31, 1996, temperatures climbed to 34°C (93°F), marking the warmest December day on record.
- Umalas experienced its chilliest December day on December 7, 1992, reaching only 25°C (77°F).
- The coldest night in December in Umalas was on December 18, 2019, with a minimum of 19°C (66°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
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What to Wear in Umalas 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! The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Umalas in December
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 Umalas's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Umalas climate overview or explore weather in Indonesia.
