Climate averages 1991–2020
Jombang weather
in December.
A hot, very wet month: the 8th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Jombang: daytime highs average 30.0°C and nights cool to about 23.2°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 266 mm of rain on roughly 27 days, which makes December a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 33 min on an average December day.
The nearest other city in this atlas is Mojokerto (24 km away). In December its highs average 30.4°C, about as warm as Jombang, with 447 mm of rain.
Among the 200 cities listed in Indonesia, Jombang ranks joint 10th of 200 for the warmest December highs and joint 35th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Jombang is 1.5°C warmer than that mean.
From December to January, average highs fall by 0.6°C to 29.4°C, and monthly rainfall rises from 266 mm to 286 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
Jombang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.4°C23.0°C | 23.0°C | 286 | 28.3 | 12.513 h |
| February | 29.3°C22.8°C | 22.8°C | 280 | 27.0 | 12.312 h |
| March | 29.7°C22.9°C | 22.9°C | 276 | 28.0 | 12.112 h |
| April | 29.9°C22.8°C | 22.8°C | 202 | 24.5 | 11.912 h |
| May | 30.3°C22.4°C | 22.4°C | 89 | 15.1 | 11.812 h |
| June | 30.4°C21.8°C | 21.8°C | 53 | 8.8 | 11.712 h |
| July | 30.8°C21.1°C | 21.1°C | 28 | 5.6 | 11.712 h |
| August | 31.7°C21.1°C | 21.1°C | 13 | 3.3 | 11.912 h |
| September | 32.8°C22.1°C | 22.1°C | 23 | 5.0 | 12.112 h |
| October | 32.9°C23.0°C | 23.0°C | 86 | 11.9 | 12.312 h |
| November | 31.5°C23.5°C | 23.5°C | 183 | 21.4 | 12.512 h |
| December, selected | 30.0°C23.2°C | 23.2°C | 266 | 26.5 | 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
- Mojokerto in DecemberIndonesia · 24 kmHigh 30.4°C · Low 23.2°C · 447 mm rain
- Pare in DecemberIndonesia · 25 kmHigh 28.8°C · Low 22.7°C · 365 mm rain
- Kediri in DecemberIndonesia · 38 kmHigh 29.1°C · Low 22.8°C · 331 mm rain
- Batu in DecemberIndonesia · 49 kmHigh 25.8°C · Low 20.1°C · 436 mm rain
- Sidoarjo in DecemberIndonesia · 55 kmHigh 30.2°C · Low 24.0°C · 253 mm rain
- Bojonegoro in DecemberIndonesia · 59 kmHigh 30.6°C · Low 23.6°C · 335 mm rain
- Lawang in DecemberIndonesia · 60 kmHigh 27.9°C · Low 21.6°C · 420 mm rain
- Kebomas in DecemberIndonesia · 61 kmHigh 29.6°C · Low 24.4°C · 274 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 Jombang) is explained once on the Jombang year overview and on the Sources, method and limits page.