Climate averages 1991–2020
Jombang weather
in January.
A hot, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Jombang: daytime highs average 29.4°C and nights cool to about 23.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 286 mm of rain on roughly 28 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average January day.
The nearest other city in this atlas is Mojokerto (24 km away). In January its highs average 29.8°C, about as warm as Jombang, with 517 mm of rain.
Among the 200 cities listed in Indonesia, Jombang ranks joint 18th of 200 for the warmest January highs and joint 75th of 200 for the driest January (rainfall, lowest first). The mean January high of those 200 cities is 28.2°C; Jombang is 1.1°C warmer than that mean.
From January to February, average highs fall by 0.1°C to 29.3°C, and monthly rainfall falls from 286 mm to 280 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
Jombang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 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 | 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
January in nearby cities
- Mojokerto in JanuaryIndonesia · 24 kmHigh 29.8°C · Low 23.0°C · 517 mm rain
- Pare in JanuaryIndonesia · 25 kmHigh 28.5°C · Low 22.5°C · 323 mm rain
- Kediri in JanuaryIndonesia · 38 kmHigh 28.7°C · Low 22.6°C · 416 mm rain
- Batu in JanuaryIndonesia · 49 kmHigh 25.7°C · Low 20.1°C · 509 mm rain
- Sidoarjo in JanuaryIndonesia · 55 kmHigh 29.6°C · Low 23.7°C · 298 mm rain
- Bojonegoro in JanuaryIndonesia · 59 kmHigh 30.0°C · Low 23.4°C · 353 mm rain
- Lawang in JanuaryIndonesia · 60 kmHigh 27.6°C · Low 21.4°C · 510 mm rain
- Kebomas in JanuaryIndonesia · 61 kmHigh 29.1°C · Low 24.2°C · 280 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.