Climate averages 1991–2020
Pematangsiantar weather
in July.
A hot, very wet month: the 3rd warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Pematangsiantar: daytime highs average 28.1°C and nights cool to about 20.8°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 236 mm of rain on roughly 27 days, which makes July a very wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 16 min on an average July day.
The nearest other city in this atlas is Tebingtinggi (42 km away). In July its highs average 29.9°C, 1.8°C warmer than Pematangsiantar, with 143 mm of rain.
Among the 200 cities listed in Indonesia, Pematangsiantar ranks joint 150th of 200 for the warmest July highs and joint 193rd of 200 for the driest July (rainfall, lowest first). The mean July high of those 200 cities is 29.0°C; Pematangsiantar is 0.9°C cooler than that mean.
From July to August, average highs fall by 0.2°C to 27.9°C, and monthly rainfall rises from 236 mm to 274 mm.
The annual picture
July 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, selected | 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 | 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
July in nearby cities
- Tebingtinggi in JulyIndonesia · 42 kmHigh 29.9°C · Low 23.7°C · 143 mm rain
- Kisaran in JulyIndonesia · 61 kmHigh 30.2°C · Low 23.6°C · 167 mm rain
- Kabanjahe in JulyIndonesia · 66 kmHigh 25.3°C · Low 17.2°C · 160 mm rain
- Perbaungan in JulyIndonesia · 69 kmHigh 29.9°C · Low 24.2°C · 126 mm rain
- Percut in JulyIndonesia · 77 kmHigh 29.9°C · Low 23.5°C · 213 mm rain
- Tanjungbalai in JulyIndonesia · 81 kmHigh 29.8°C · Low 24.7°C · 177 mm rain
- Medan in JulyIndonesia · 82 kmHigh 30.0°C · Low 22.6°C · 217 mm rain
- Sunggal in JulyIndonesia · 85 kmHigh 30.3°C · Low 22.3°C · 186 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.