Climate averages 1991–2020
Loa Janan weather
in September.
A hot, wet month: one of the warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Loa Janan: daytime highs average 30.6°C and nights cool to about 23.6°C. By daytime temperature it is one of the warmest months of the year.
Expect about 167 mm of rain on roughly 21 days, which makes September a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average September day.
The nearest other city in this atlas is Samarinda (12 km away). In September its highs average 30.6°C, about as warm as Loa Janan, with 173 mm of rain.
Among the 200 cities listed in Indonesia, Loa Janan ranks joint 82nd of 200 for the warmest September highs and 161st of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Loa Janan is 0.5°C warmer than that mean.
From September to October, average highs rise by 0.1°C to 30.6°C, and monthly rainfall rises from 167 mm to 233 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
Loa Janan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.8°C23.3°C | 23.3°C | 277 | 26.4 | 12.112 h |
| February | 30.0°C23.4°C | 23.4°C | 244 | 23.7 | 12.112 h |
| March | 30.2°C23.5°C | 23.5°C | 299 | 26.9 | 12.112 h |
| April | 30.3°C23.7°C | 23.7°C | 307 | 27.5 | 12.112 h |
| May | 30.1°C23.9°C | 23.9°C | 256 | 28.7 | 12.112 h |
| June | 29.7°C23.6°C | 23.6°C | 214 | 25.7 | 12.112 h |
| July | 29.4°C23.4°C | 23.4°C | 178 | 23.7 | 12.112 h |
| August | 30.0°C23.5°C | 23.5°C | 159 | 21.2 | 12.112 h |
| September, selected | 30.6°C23.6°C | 23.6°C | 167 | 20.7 | 12.112 h |
| October | 30.6°C23.6°C | 23.6°C | 233 | 26.0 | 12.112 h |
| November | 30.1°C23.5°C | 23.5°C | 294 | 28.5 | 12.112 h |
| December | 29.8°C23.5°C | 23.5°C | 298 | 28.9 | 12.212 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
- Samarinda in SeptemberIndonesia · 12 kmHigh 30.6°C · Low 23.4°C · 173 mm rain
- Nusantara in SeptemberIndonesia · 61 kmHigh 29.9°C · Low 23.4°C · 155 mm rain
- Balikpapan in SeptemberIndonesia · 82 kmHigh 28.2°C · Low 24.6°C · 109 mm rain
- Bontang in SeptemberIndonesia · 91 kmHigh 29.6°C · Low 24.4°C · 130 mm rain
- Majene in SeptemberIndonesia · 389 kmHigh 28.7°C · Low 25.1°C · 41 mm rain
- Palangkaraya in SeptemberIndonesia · 397 kmHigh 31.9°C · Low 23.3°C · 113 mm rain
- Martapura in SeptemberIndonesia · 400 kmHigh 31.8°C · Low 23.4°C · 74 mm rain
- Banjarbaru in SeptemberIndonesia · 405 kmHigh 31.9°C · Low 23.0°C · 74 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 Loa Janan) is explained once on the Loa Janan year overview and on the Sources, method and limits page.