Climate averages 1991–2020
Pematangsiantar weather
in October.
A warm, very wet month: the joint 8th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Pematangsiantar: daytime highs average 27.1°C and nights cool to about 20.6°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 375 mm of rain on roughly 30 days, which makes October a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 03 min on an average October day.
The nearest other city in this atlas is Tebingtinggi (42 km away). In October its highs average 28.9°C, 1.8°C warmer than Pematangsiantar, with 284 mm of rain.
Among the 200 cities listed in Indonesia, Pematangsiantar ranks 191st of 200 for the warmest October highs and 193rd of 200 for the driest October (rainfall, lowest first). The mean October high of those 200 cities is 30.1°C; Pematangsiantar is 2.9°C cooler than that mean.
From October to November, average highs fall by 0.5°C to 26.6°C, and monthly rainfall falls from 375 mm to 351 mm.
The annual picture
October 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
Pematangsiantar climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.6°C20.2°C | 20.2°C | 240 | 27.9 | 12.012 h |
| February | 27.1°C20.2°C | 20.2°C | 190 | 24.3 | 12.012 h |
| March | 27.8°C20.7°C | 20.7°C | 217 | 26.4 | 12.112 h |
| April | 27.9°C21.0°C | 21.0°C | 249 | 28.6 | 12.212 h |
| May | 28.2°C21.3°C | 21.3°C | 265 | 29.2 | 12.312 h |
| June | 28.3°C21.1°C | 21.1°C | 231 | 27.1 | 12.312 h |
| July | 28.1°C20.8°C | 20.8°C | 236 | 26.7 | 12.312 h |
| August | 27.9°C20.7°C | 20.7°C | 274 | 28.7 | 12.212 h |
| September | 27.5°C20.6°C | 20.6°C | 361 | 29.4 | 12.112 h |
| October, selected | 27.1°C20.6°C | 20.6°C | 375 | 30.2 | 12.112 h |
| November | 26.6°C20.6°C | 20.6°C | 351 | 29.4 | 12.012 h |
| December | 26.3°C20.5°C | 20.5°C | 315 | 29.6 | 12.012 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
October in nearby cities
- Tebingtinggi in OctoberIndonesia · 42 kmHigh 28.9°C · Low 23.2°C · 284 mm rain
- Kisaran in OctoberIndonesia · 61 kmHigh 29.4°C · Low 23.3°C · 316 mm rain
- Kabanjahe in OctoberIndonesia · 66 kmHigh 24.5°C · Low 17.2°C · 308 mm rain
- Perbaungan in OctoberIndonesia · 69 kmHigh 28.9°C · Low 23.7°C · 276 mm rain
- Percut in OctoberIndonesia · 77 kmHigh 28.9°C · Low 23.1°C · 362 mm rain
- Tanjungbalai in OctoberIndonesia · 81 kmHigh 29.1°C · Low 24.1°C · 333 mm rain
- Medan in OctoberIndonesia · 82 kmHigh 29.0°C · Low 22.5°C · 393 mm rain
- Sunggal in OctoberIndonesia · 85 kmHigh 29.0°C · Low 22.1°C · 338 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 Pematangsiantar) is explained once on the Pematangsiantar year overview and on the Sources, method and limits page.