Climate averages 1991–2020
Bontang weather
in December.
A hot, very wet month: the joint 8th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Bontang: daytime highs average 29.1°C and nights cool to about 24.1°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 248 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 07 min on an average December day.
The nearest other city in this atlas is Samarinda (79 km away). In December its highs average 29.7°C, 0.6°C warmer than Bontang, with 315 mm of rain.
Among the 200 cities listed in Indonesia, Bontang ranks joint 59th of 200 for the warmest December highs and joint 16th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Bontang is 0.6°C warmer than that mean.
From December to January, average highs fall by 0.1°C to 28.9°C, and monthly rainfall falls from 248 mm to 205 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
Bontang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.9°C24.1°C | 24.1°C | 205 | 25.2 | 12.112 h |
| February | 29.1°C24.2°C | 24.2°C | 164 | 22.1 | 12.112 h |
| March | 29.3°C24.3°C | 24.3°C | 206 | 25.3 | 12.112 h |
| April | 29.4°C24.4°C | 24.4°C | 214 | 26.5 | 12.112 h |
| May | 29.3°C24.6°C | 24.6°C | 197 | 27.0 | 12.112 h |
| June | 29.0°C24.4°C | 24.4°C | 177 | 24.8 | 12.112 h |
| July | 28.9°C24.2°C | 24.2°C | 150 | 22.3 | 12.112 h |
| August | 29.2°C24.3°C | 24.3°C | 124 | 19.9 | 12.112 h |
| September | 29.6°C24.4°C | 24.4°C | 130 | 20.4 | 12.112 h |
| October | 29.6°C24.4°C | 24.4°C | 176 | 25.3 | 12.112 h |
| November | 29.2°C24.2°C | 24.2°C | 220 | 28.3 | 12.112 h |
| December, selected | 29.1°C24.1°C | 24.1°C | 248 | 28.9 | 12.112 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
- Samarinda in DecemberIndonesia · 79 kmHigh 29.7°C · Low 23.3°C · 315 mm rain
- Loa Janan in DecemberIndonesia · 91 kmHigh 29.8°C · Low 23.5°C · 298 mm rain
- Nusantara in DecemberIndonesia · 150 kmHigh 29.5°C · Low 23.5°C · 349 mm rain
- Balikpapan in DecemberIndonesia · 172 kmHigh 28.4°C · Low 24.1°C · 268 mm rain
- Tarakan in DecemberIndonesia · 354 kmHigh 27.9°C · Low 24.6°C · 298 mm rain
- Toli-Toli in DecemberIndonesia · 384 kmHigh 26.3°C · Low 21.5°C · 168 mm rain
- Majene in DecemberIndonesia · 440 kmHigh 28.1°C · Low 25.3°C · 187 mm rain
- Tawau in DecemberMalaysia · 459 kmHigh 28.9°C · Low 24.2°C · 190 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 Bontang) is explained once on the Bontang year overview and on the Sources, method and limits page.