Climate averages 1991–2020
Nusantara weather
in January.
A hot, very wet month: the joint 7th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Nusantara: daytime highs average 29.5°C and nights cool to about 23.3°C. By daytime temperature it is the joint 7th warmest of the 12 months.
Expect about 323 mm of rain on roughly 28 days, which makes January a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average January day.
The nearest other city in this atlas is Balikpapan (35 km away). In January its highs average 28.3°C, 1.2°C cooler than Nusantara, with 258 mm of rain.
Among the 200 cities listed in Indonesia, Nusantara ranks joint 14th of 200 for the warmest January highs and joint 108th of 200 for the driest January (rainfall, lowest first). The mean January high of those 200 cities is 28.2°C; Nusantara is 1.2°C warmer than that mean.
From January to February, average highs rise by 0.3°C to 29.8°C, and monthly rainfall falls from 323 mm to 288 mm.
The annual picture
January 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
Nusantara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 29.5°C23.3°C | 23.3°C | 323 | 27.9 | 12.212 h |
| February | 29.8°C23.4°C | 23.4°C | 288 | 24.5 | 12.112 h |
| March | 29.9°C23.5°C | 23.5°C | 349 | 28.5 | 12.112 h |
| April | 29.8°C23.7°C | 23.7°C | 356 | 27.9 | 12.112 h |
| May | 29.5°C23.8°C | 23.8°C | 270 | 28.2 | 12.112 h |
| June | 29.0°C23.5°C | 23.5°C | 221 | 25.4 | 12.112 h |
| July | 28.7°C23.2°C | 23.2°C | 181 | 23.5 | 12.112 h |
| August | 29.2°C23.2°C | 23.2°C | 142 | 20.3 | 12.112 h |
| September | 29.9°C23.4°C | 23.4°C | 155 | 18.9 | 12.112 h |
| October | 30.1°C23.5°C | 23.5°C | 222 | 24.0 | 12.112 h |
| November | 29.7°C23.5°C | 23.5°C | 308 | 28.4 | 12.212 h |
| December | 29.5°C23.5°C | 23.5°C | 349 | 29.4 | 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
January in nearby cities
- Balikpapan in JanuaryIndonesia · 35 kmHigh 28.3°C · Low 23.9°C · 258 mm rain
- Loa Janan in JanuaryIndonesia · 61 kmHigh 29.8°C · Low 23.3°C · 277 mm rain
- Samarinda in JanuaryIndonesia · 72 kmHigh 29.6°C · Low 23.2°C · 279 mm rain
- Bontang in JanuaryIndonesia · 150 kmHigh 28.9°C · Low 24.1°C · 205 mm rain
- Palangkaraya in JanuaryIndonesia · 339 kmHigh 30.0°C · Low 23.2°C · 282 mm rain
- Martapura in JanuaryIndonesia · 340 kmHigh 29.4°C · Low 23.4°C · 338 mm rain
- Banjarbaru in JanuaryIndonesia · 344 kmHigh 29.2°C · Low 23.3°C · 338 mm rain
- Banjarmasin in JanuaryIndonesia · 351 kmHigh 29.3°C · Low 23.7°C · 291 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 Nusantara) is explained once on the Nusantara year overview and on the Sources, method and limits page.