Climate averages 1991–2020
Klaten weather
in September.
A hot, moderately wet month: the warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Klaten: daytime highs average 31.0°C and nights cool to about 20.9°C. By daytime temperature it is the warmest month of the year.
Expect about 41 mm of rain on roughly 6 days, which makes September a moderately wet month (the 3rd 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 Kartasura (22 km away). In September its highs average 31.5°C, 0.5°C warmer than Klaten, with 40 mm of rain.
Among the 200 cities listed in Indonesia, Klaten ranks joint 70th of 200 for the warmest September highs and joint 56th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Klaten is 0.9°C warmer than that mean.
From September to October, average highs fall by 0.1°C to 30.8°C, and monthly rainfall rises from 41 mm to 135 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
Klaten climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.4°C21.9°C | 21.9°C | 428 | 29.3 | 12.513 h |
| February | 28.7°C21.8°C | 21.8°C | 428 | 27.7 | 12.412 h |
| March | 28.9°C21.9°C | 21.9°C | 372 | 29.0 | 12.112 h |
| April | 29.2°C21.9°C | 21.9°C | 260 | 25.5 | 11.912 h |
| May | 29.5°C21.5°C | 21.5°C | 122 | 16.8 | 11.812 h |
| June | 29.6°C20.9°C | 20.9°C | 70 | 10.7 | 11.712 h |
| July | 29.7°C20.2°C | 20.2°C | 36 | 6.1 | 11.712 h |
| August | 30.2°C20.0°C | 20.0°C | 21 | 3.9 | 11.912 h |
| September, selected | 31.0°C20.9°C | 20.9°C | 41 | 6.4 | 12.112 h |
| October | 30.8°C21.9°C | 21.9°C | 135 | 16.0 | 12.312 h |
| November | 29.3°C22.2°C | 22.2°C | 297 | 25.8 | 12.512 h |
| December | 28.3°C22.0°C | 22.0°C | 391 | 28.5 | 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
September in nearby cities
- Kartasura in SeptemberIndonesia · 22 kmHigh 31.5°C · Low 21.5°C · 40 mm rain
- Yogyakarta in SeptemberIndonesia · 29 kmHigh 29.7°C · Low 21.4°C · 66 mm rain
- Wonosari in SeptemberIndonesia · 29 kmHigh 29.5°C · Low 22.0°C · 25 mm rain
- Surakarta in SeptemberIndonesia · 30 kmHigh 32.3°C · Low 22.1°C · 40 mm rain
- Sewon in SeptemberIndonesia · 33 kmHigh 29.5°C · Low 22.3°C · 36 mm rain
- Kasihan in SeptemberIndonesia · 33 kmHigh 28.8°C · Low 21.4°C · 66 mm rain
- Muntilan in SeptemberIndonesia · 37 kmHigh 28.5°C · Low 20.1°C · 102 mm rain
- Salatiga in SeptemberIndonesia · 43 kmHigh 30.1°C · Low 20.5°C · 53 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 Klaten) is explained once on the Klaten year overview and on the Sources, method and limits page.