Climate averages 1991–2020
Loa Janan weather
in December.
A hot, very wet month: the joint 9th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Loa Janan: daytime highs average 29.8°C and nights cool to about 23.5°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 298 mm of rain on roughly 29 days, which makes December a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average December day.
The nearest other city in this atlas is Samarinda (12 km away). In December its highs average 29.7°C, about as warm as Loa Janan, with 315 mm of rain.
Among the 200 cities listed in Indonesia, Loa Janan ranks joint 15th of 200 for the warmest December highs and joint 63rd of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Loa Janan is 1.4°C warmer than that mean.
From December to January, average highs stay level at 29.8°C, and monthly rainfall falls from 298 mm to 277 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
Loa Janan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.8°C23.3°C | 23.3°C | 277 | 26.4 | 12.112 h |
| February | 30.0°C23.4°C | 23.4°C | 244 | 23.7 | 12.112 h |
| March | 30.2°C23.5°C | 23.5°C | 299 | 26.9 | 12.112 h |
| April | 30.3°C23.7°C | 23.7°C | 307 | 27.5 | 12.112 h |
| May | 30.1°C23.9°C | 23.9°C | 256 | 28.7 | 12.112 h |
| June | 29.7°C23.6°C | 23.6°C | 214 | 25.7 | 12.112 h |
| July | 29.4°C23.4°C | 23.4°C | 178 | 23.7 | 12.112 h |
| August | 30.0°C23.5°C | 23.5°C | 159 | 21.2 | 12.112 h |
| September | 30.6°C23.6°C | 23.6°C | 167 | 20.7 | 12.112 h |
| October | 30.6°C23.6°C | 23.6°C | 233 | 26.0 | 12.112 h |
| November | 30.1°C23.5°C | 23.5°C | 294 | 28.5 | 12.112 h |
| December, selected | 29.8°C23.5°C | 23.5°C | 298 | 28.9 | 12.212 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 · 12 kmHigh 29.7°C · Low 23.3°C · 315 mm rain
- Nusantara in DecemberIndonesia · 61 kmHigh 29.5°C · Low 23.5°C · 349 mm rain
- Balikpapan in DecemberIndonesia · 82 kmHigh 28.4°C · Low 24.1°C · 268 mm rain
- Bontang in DecemberIndonesia · 91 kmHigh 29.1°C · Low 24.1°C · 248 mm rain
- Majene in DecemberIndonesia · 389 kmHigh 28.1°C · Low 25.3°C · 187 mm rain
- Palangkaraya in DecemberIndonesia · 397 kmHigh 29.9°C · Low 23.3°C · 297 mm rain
- Martapura in DecemberIndonesia · 400 kmHigh 29.2°C · Low 23.5°C · 390 mm rain
- Banjarbaru in DecemberIndonesia · 405 kmHigh 29.1°C · Low 23.4°C · 390 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 Loa Janan) is explained once on the Loa Janan year overview and on the Sources, method and limits page.