Climate averages 1991–2020
Jember weather
in December.
A hot, very wet month: the joint 10th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Jember: daytime highs average 28.4°C and nights cool to about 22.8°C. By daytime temperature it is the joint 10th warmest of the 12 months.
Expect about 338 mm of rain on roughly 28 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 35 min on an average December day.
The nearest other city in this atlas is Lumajang (52 km away). In December its highs average 29.1°C, 0.7°C warmer than Jember, with 316 mm of rain.
Among the 200 cities listed in Indonesia, Jember ranks joint 116th of 200 for the warmest December highs and 111th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Jember is level with that mean.
From December to January, average highs rise by 0.1°C to 28.5°C, and monthly rainfall rises from 338 mm to 358 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
Jember climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 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, selected | 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
December in nearby cities
- Lumajang in DecemberIndonesia · 52 kmHigh 29.1°C · Low 23.8°C · 316 mm rain
- Genteng in DecemberIndonesia · 54 kmHigh 28.1°C · Low 22.4°C · 351 mm rain
- Situbondo in DecemberIndonesia · 62 kmHigh 28.6°C · Low 23.8°C · 434 mm rain
- Probolinggo in DecemberIndonesia · 71 kmHigh 28.8°C · Low 24.9°C · 255 mm rain
- Banyuwangi in DecemberIndonesia · 73 kmHigh 29.8°C · Low 24.5°C · 351 mm rain
- Negara in DecemberIndonesia · 103 kmHigh 28.7°C · Low 25.0°C · 218 mm rain
- Pasuruan in DecemberIndonesia · 105 kmHigh 29.1°C · Low 23.3°C · 321 mm rain
- Pamekasan in DecemberIndonesia · 116 kmHigh 29.1°C · Low 25.2°C · 289 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.