Climate averages 1991–2020
Jember weather
in January.
A hot, very wet month: the 9th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Jember: daytime highs average 28.5°C and nights cool to about 22.7°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 358 mm of rain on roughly 29 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 32 min on an average January day.
The nearest other city in this atlas is Lumajang (52 km away). In January its highs average 29.0°C, 0.5°C warmer than Jember, with 357 mm of rain.
Among the 200 cities listed in Indonesia, Jember ranks joint 103rd of 200 for the warmest January highs and 148th of 200 for the driest January (rainfall, lowest first). The mean January high of those 200 cities is 28.2°C; Jember is 0.3°C warmer than that mean.
From January to February, average highs rise by 0.3°C to 28.7°C, and monthly rainfall falls from 358 mm to 337 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
Jember climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 28.5°C22.7°C | 22.7°C | 358 | 29.3 | 12.513 h |
| February | 28.7°C22.7°C | 22.7°C | 337 | 27.4 | 12.412 h |
| March | 29.1°C22.7°C | 22.7°C | 322 | 27.8 | 12.212 h |
| April | 29.3°C22.7°C | 22.7°C | 214 | 24.3 | 11.912 h |
| May | 29.2°C22.1°C | 22.1°C | 108 | 15.5 | 11.712 h |
| June | 28.6°C21.4°C | 21.4°C | 64 | 10.7 | 11.712 h |
| July | 28.1°C20.7°C | 20.7°C | 38 | 7.5 | 11.712 h |
| August | 28.4°C20.5°C | 20.5°C | 25 | 6.2 | 11.812 h |
| September | 29.3°C21.3°C | 21.3°C | 57 | 10.2 | 12.112 h |
| October | 29.8°C22.3°C | 22.3°C | 119 | 18.0 | 12.312 h |
| November | 29.1°C22.9°C | 22.9°C | 268 | 25.4 | 12.512 h |
| December | 28.4°C22.8°C | 22.8°C | 338 | 28.2 | 12.613 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
- Lumajang in JanuaryIndonesia · 52 kmHigh 29.0°C · Low 23.8°C · 357 mm rain
- Genteng in JanuaryIndonesia · 54 kmHigh 28.0°C · Low 22.5°C · 446 mm rain
- Situbondo in JanuaryIndonesia · 62 kmHigh 28.2°C · Low 23.6°C · 427 mm rain
- Probolinggo in JanuaryIndonesia · 71 kmHigh 28.3°C · Low 24.6°C · 276 mm rain
- Banyuwangi in JanuaryIndonesia · 73 kmHigh 29.7°C · Low 24.3°C · 446 mm rain
- Negara in JanuaryIndonesia · 103 kmHigh 28.6°C · Low 24.8°C · 270 mm rain
- Pasuruan in JanuaryIndonesia · 105 kmHigh 28.6°C · Low 23.0°C · 376 mm rain
- Pamekasan in JanuaryIndonesia · 116 kmHigh 28.6°C · Low 25.2°C · 308 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 Jember) is explained once on the Jember year overview and on the Sources, method and limits page.