Climate averages 1991–2020
Banjarmasin weather
in December.
A hot, very wet month: the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Banjarmasin: daytime highs average 29.2°C and nights cool to about 23.8°C. By daytime temperature it is the coolest month of the year.
Expect about 328 mm of rain on roughly 29 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average December day.
The nearest other city in this atlas is Banjarbaru (30 km away). In December its highs average 29.1°C, about as warm as Banjarmasin, with 390 mm of rain.
Among the 200 cities listed in Indonesia, Banjarmasin ranks joint 52nd of 200 for the warmest December highs and joint 95th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Banjarmasin is 0.7°C warmer than that mean.
From December to January, average highs rise by 0.1°C to 29.3°C, and monthly rainfall falls from 328 mm to 291 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Banjarmasin climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.3°C23.7°C | 23.7°C | 291 | 28.7 | 12.312 h |
| February | 29.6°C23.8°C | 23.8°C | 248 | 25.1 | 12.212 h |
| March | 29.7°C23.9°C | 23.9°C | 277 | 28.2 | 12.112 h |
| April | 29.9°C24.1°C | 24.1°C | 236 | 27.3 | 12.012 h |
| May | 30.1°C24.2°C | 24.2°C | 149 | 22.5 | 12.012 h |
| June | 29.7°C23.9°C | 23.9°C | 113 | 17.5 | 11.912 h |
| July | 29.7°C23.4°C | 23.4°C | 89 | 14.5 | 11.912 h |
| August | 30.8°C23.5°C | 23.5°C | 52 | 9.3 | 12.012 h |
| September | 31.6°C23.8°C | 23.8°C | 69 | 10.5 | 12.112 h |
| October | 31.4°C24.0°C | 24.0°C | 152 | 18.2 | 12.212 h |
| November | 30.0°C24.0°C | 24.0°C | 254 | 27.6 | 12.312 h |
| December, selected | 29.2°C23.8°C | 23.8°C | 328 | 29.4 | 12.312 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Banjarbaru in DecemberIndonesia · 30 kmHigh 29.1°C · Low 23.4°C · 390 mm rain
- Martapura in DecemberIndonesia · 32 kmHigh 29.2°C · Low 23.5°C · 390 mm rain
- Palangkaraya in DecemberIndonesia · 145 kmHigh 29.9°C · Low 23.3°C · 297 mm rain
- Sampit in DecemberIndonesia · 202 kmHigh 29.8°C · Low 23.6°C · 286 mm rain
- Pangkalanbuun in DecemberIndonesia · 337 kmHigh 29.2°C · Low 23.5°C · 294 mm rain
- Balikpapan in DecemberIndonesia · 338 kmHigh 28.4°C · Low 24.1°C · 268 mm rain
- Nusantara in DecemberIndonesia · 351 kmHigh 29.5°C · Low 23.5°C · 349 mm rain
- Loa Janan in DecemberIndonesia · 412 kmHigh 29.8°C · Low 23.5°C · 298 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Banjarmasin) is explained once on the Banjarmasin year overview and on the Sources, method and limits page.