Climate averages 1991–2020
Pekalongan weather
in September.
A hot, 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 Pekalongan: daytime highs average 30.6°C and nights cool to about 23.6°C. By daytime temperature it is the warmest month of the year.
Expect about 123 mm of rain on roughly 15 days, which makes September a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average September day.
The nearest other city in this atlas is Kedungwuni (10 km away). In September its highs average 30.9°C, about as warm as Pekalongan, with 123 mm of rain.
Among the 200 cities listed in Indonesia, Pekalongan ranks joint 82nd of 200 for the warmest September highs and joint 137th of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Pekalongan is 0.5°C warmer than that mean.
From September to October, average highs fall by 0.2°C to 30.4°C, and monthly rainfall rises from 123 mm to 293 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
Pekalongan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.0°C23.7°C | 23.7°C | 410 | 30.4 | 12.512 h |
| February | 28.0°C23.7°C | 23.7°C | 384 | 27.8 | 12.312 h |
| March | 28.5°C23.9°C | 23.9°C | 414 | 30.2 | 12.112 h |
| April | 28.9°C24.1°C | 24.1°C | 377 | 28.4 | 12.012 h |
| May | 29.2°C24.0°C | 24.0°C | 202 | 23.3 | 11.812 h |
| June | 29.0°C23.5°C | 23.5°C | 148 | 17.2 | 11.712 h |
| July | 29.1°C23.0°C | 23.0°C | 103 | 14.4 | 11.812 h |
| August | 29.8°C22.9°C | 22.9°C | 76 | 11.8 | 11.912 h |
| September, selected | 30.6°C23.6°C | 23.6°C | 123 | 14.8 | 12.112 h |
| October | 30.4°C24.2°C | 24.2°C | 293 | 22.7 | 12.312 h |
| November | 29.1°C24.2°C | 24.2°C | 465 | 28.3 | 12.412 h |
| December | 28.5°C24.0°C | 24.0°C | 517 | 29.6 | 12.513 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
- Kedungwuni in SeptemberIndonesia · 10 kmHigh 30.9°C · Low 23.2°C · 123 mm rain
- Pemalang in SeptemberIndonesia · 32 kmHigh 31.2°C · Low 24.2°C · 94 mm rain
- Tarub in SeptemberIndonesia · 56 kmHigh 31.4°C · Low 24.2°C · 63 mm rain
- Wonosobo in SeptemberIndonesia · 58 kmHigh 26.2°C · Low 18.9°C · 89 mm rain
- Tegal in SeptemberIndonesia · 59 kmHigh 31.5°C · Low 24.1°C · 37 mm rain
- Purwokerto in SeptemberIndonesia · 77 kmHigh 29.4°C · Low 22.0°C · 90 mm rain
- Semarang in SeptemberIndonesia · 83 kmHigh 31.7°C · Low 23.6°C · 44 mm rain
- Ungaran in SeptemberIndonesia · 85 kmHigh 30.6°C · Low 21.7°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 Pekalongan) is explained once on the Pekalongan year overview and on the Sources, method and limits page.
Kedungwuni lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.