Surabaya Weather in December
During December, Surabaya experiences very high daytime temperatures of 33°C (91°F) and cooler nights around 26°C (79°F). December sits within the rainy season, so expect regular and often heavy rainfall.
Rainfall in Surabaya in December
As part of the rainy season, Surabaya sees around 14 days of rain in December, with an average of 282 mm (11 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Surabaya in December
In December, Surabaya sees very high temperatures, with highs of 33°C (91°F). Nights drop to around 26°C (79°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 26°C (79°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Surabaya in December
You can expect a moderate amount of sunlight, with approximately 137 hours. Even though this month is part of the wet season, you can still see the sun occasionally.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Surabaya. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Surabaya's climate page.
Surabaya Temperature in December
Min Temperature
26°C (79°F)
Max Temperature
33°C (91°F)
Chance of Rain
46%
Precipitation
282 mm (11 in)
Rainy days
14 days
Humidity
63%
Sunshine
137 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Surabaya typically stay consistent throughout December, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in December
Daily Historical Precipitation
49-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 Surabaya in December
Browse day-by-day weather records for Surabaya spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Surabaya historical weather extremes in December
According to our 35 years of weather records for Surabaya, the following extremes were recorded between 1990 and 2025.
- The warmest day in December was on December 2, 2002, with a maximum of 38°C (100°F).
- On December 12, 1991, Surabaya saw its coldest December day with temperatures maxing out at 25°C (77°F).
- The lowest overnight temperature recorded in December was 19°C (66°F) (December 21, 1994).
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 →
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What to Wear in Surabaya 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! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Surabaya 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 Surabaya's climate page.
Temperature Rainfall Sunshine Humidity
See the full Surabaya climate overview or explore weather in Indonesia.
