Climate averages 1991–2020
Lumajang weather
in September.
A hot, moderately wet month: the joint 7th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Lumajang: daytime highs average 29.0°C and nights cool to about 21.7°C. By daytime temperature it is the joint 7th warmest of the 12 months.
Expect about 67 mm of rain on roughly 12 days, which makes September a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 03 min on an average September day.
The nearest other city in this atlas is Probolinggo (42 km away). In September its highs average 30.5°C, 1.5°C warmer than Lumajang, with 12 mm of rain.
Among the 200 cities listed in Indonesia, Lumajang ranks 147th of 200 for the warmest September highs and 96th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Lumajang is 1.1°C cooler than that mean.
From September to October, average highs rise by 1.0°C to 29.9°C, and monthly rainfall rises from 67 mm to 96 mm.
The annual picture
September 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
Lumajang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.0°C23.8°C | 23.8°C | 357 | 28.7 | 12.513 h |
| February | 29.1°C23.7°C | 23.7°C | 352 | 26.8 | 12.412 h |
| March | 29.4°C23.9°C | 23.9°C | 283 | 26.8 | 12.212 h |
| April | 29.4°C23.9°C | 23.9°C | 163 | 23.0 | 11.912 h |
| May | 29.0°C23.4°C | 23.4°C | 92 | 15.6 | 11.712 h |
| June | 28.3°C22.6°C | 22.6°C | 62 | 12.7 | 11.712 h |
| July | 27.6°C21.6°C | 21.6°C | 44 | 11.3 | 11.712 h |
| August | 27.9°C21.2°C | 21.2°C | 35 | 10.4 | 11.812 h |
| September, selected | 29.0°C21.7°C | 21.7°C | 67 | 12.1 | 12.112 h |
| October | 29.9°C22.9°C | 22.9°C | 96 | 16.8 | 12.312 h |
| November | 29.6°C23.7°C | 23.7°C | 227 | 23.5 | 12.512 h |
| December | 29.1°C23.8°C | 23.8°C | 316 | 27.0 | 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
September in nearby cities
- Probolinggo in SeptemberIndonesia · 42 kmHigh 30.5°C · Low 24.2°C · 12 mm rain
- Jember in SeptemberIndonesia · 52 kmHigh 29.3°C · Low 21.3°C · 57 mm rain
- Pasuruan in SeptemberIndonesia · 65 kmHigh 31.9°C · Low 22.8°C · 10 mm rain
- Lawang in SeptemberIndonesia · 67 kmHigh 31.0°C · Low 20.0°C · 21 mm rain
- Singosari in SeptemberIndonesia · 67 kmHigh 30.5°C · Low 20.1°C · 43 mm rain
- Malang in SeptemberIndonesia · 68 kmHigh 29.4°C · Low 19.9°C · 43 mm rain
- Bangil in SeptemberIndonesia · 74 kmHigh 33.0°C · Low 22.3°C · 11 mm rain
- Batu in SeptemberIndonesia · 82 kmHigh 28.4°C · Low 18.5°C · 56 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 Lumajang) is explained once on the Lumajang year overview and on the Sources, method and limits page.