Weather in Pematang Siantar, Indonesia
Historical monthly conditions · 2021–2025
Monthly averages
Average daily air-temperature lows/highs and peak wind gusts. Rain is the average monthly total.
| Month | Avg low | Avg high | Rain | Cloud cover | Avg peak gust |
|---|---|---|---|---|---|
| January | 21°C | 28°C | 293.2 mm | 93% | 24.5 km/h |
| February | 21°C | 29°C | 197.7 mm | 87% | 26.0 km/h |
| March | 22°C | 29°C | 268.3 mm | 86% | 24.8 km/h |
| April | 22°C | 29°C | 261.4 mm | 94% | 24.1 km/h |
| May | 23°C | 30°C | 289.4 mm | 92% | 25.7 km/h |
| June | 22°C | 29°C | 251.9 mm | 89% | 26.1 km/h |
| July | 22°C | 30°C | 189.5 mm | 86% | 26.9 km/h |
| August | 22°C | 29°C | 367.6 mm | 91% | 25.4 km/h |
| September | 22°C | 29°C | 320.8 mm | 93% | 26.5 km/h |
| October | 22°C | 29°C | 331.7 mm | 94% | 26.1 km/h |
| November | 22°C | 28°C | 408.6 mm | 97% | 27.0 km/h |
| December | 22°C | 28°C | 402.2 mm | 95% | 26.1 km/h |
Weather match by month
Feels like 15°C–30°C · cloud ≤60% · rain ≤0.1 mm/h · gust ≤50 km/h
Feels-like temperature accounts for humidity and wind in shade. Percentages cover 08:00–20:00 local solar time.
| Month | Match rate | |
|---|---|---|
| January | 2.2% | |
| February | 4.8% | |
| March | 3.3% | |
| April | 0.3% | |
| May | 0.8% | |
| June | 1.3% | |
| July | 1.7% | |
| August | 1.1% | |
| September | 1.3% | |
| October | 0.7% | |
| November | 0.8% | |
| December | 1.2% |
About this location and data
- Urban-centre population
- 446,269
- Elevation
- 511 m
- Coordinates
- 2.97°N, 99.07°E
- Urban area
- 69 km²
Weather averages use 2 ERA5 grid cells, weighted by the area of the urban centre in each cell.
2021-2025 recent-weather sample (not a 30-year normal).
How the weather scores are calculated