Climate averages 1991–2020
Binjai weather
in September.
A hot, very wet month: the joint 6th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Binjai: daytime highs average 29.7°C and nights cool to about 21.9°C. By daytime temperature it is the joint 6th warmest of the 12 months.
Expect about 306 mm of rain on roughly 29 days, which makes September a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 08 min on an average September day.
The nearest other city in this atlas is Sunggal (15 km away). In September its highs average 29.6°C, about as warm as Binjai, with 306 mm of rain.
Among the 200 cities listed in Indonesia, Binjai ranks joint 115th of 200 for the warmest September highs and joint 191st of 200 for the driest September (rainfall, lowest first). The mean September high of those 200 cities is 30.1°C; Binjai is 0.4°C cooler than that mean.
From September to October, average highs fall by 0.7°C to 29.0°C, and monthly rainfall rises from 306 mm to 338 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
Binjai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.3°C21.5°C | 21.5°C | 237 | 26.3 | 11.912 h |
| February | 29.0°C21.4°C | 21.4°C | 180 | 22.2 | 12.012 h |
| March | 29.7°C21.8°C | 21.8°C | 211 | 25.4 | 12.112 h |
| April | 29.8°C22.1°C | 22.1°C | 252 | 28.1 | 12.212 h |
| May | 30.3°C22.5°C | 22.5°C | 266 | 27.9 | 12.312 h |
| June | 30.5°C22.3°C | 22.3°C | 189 | 24.3 | 12.312 h |
| July | 30.6°C22.0°C | 22.0°C | 186 | 24.9 | 12.312 h |
| August | 30.4°C22.0°C | 22.0°C | 213 | 26.8 | 12.212 h |
| September, selected | 29.7°C21.9°C | 21.9°C | 306 | 28.6 | 12.112 h |
| October | 29.0°C21.7°C | 21.7°C | 338 | 29.6 | 12.012 h |
| November | 28.2°C21.7°C | 21.7°C | 358 | 28.8 | 12.012 h |
| December | 27.8°C21.7°C | 21.7°C | 345 | 28.7 | 11.912 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
- Sunggal in SeptemberIndonesia · 15 kmHigh 29.6°C · Low 22.2°C · 306 mm rain
- Medan in SeptemberIndonesia · 20 kmHigh 29.5°C · Low 22.5°C · 353 mm rain
- Belawan in SeptemberIndonesia · 29 kmHigh 29.7°C · Low 23.2°C · 324 mm rain
- Percut in SeptemberIndonesia · 42 kmHigh 29.4°C · Low 23.2°C · 324 mm rain
- Perbaungan in SeptemberIndonesia · 52 kmHigh 29.4°C · Low 23.8°C · 219 mm rain
- Kabanjahe in SeptemberIndonesia · 56 kmHigh 25.0°C · Low 17.2°C · 247 mm rain
- Tebingtinggi in SeptemberIndonesia · 81 kmHigh 29.4°C · Low 23.4°C · 238 mm rain
- Pematangsiantar in SeptemberIndonesia · 96 kmHigh 27.5°C · Low 20.6°C · 361 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 Binjai) is explained once on the Binjai year overview and on the Sources, method and limits page.
Sunggal lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.