Climate averages 1991–2020
Subulussalam weather
in December.
A hot, very wet month: the joint 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Subulussalam: daytime highs average 28.6°C and nights cool to about 21.1°C. By daytime temperature it is the joint 10th warmest of the 12 months.
Expect about 395 mm of rain on roughly 28 days, which makes December a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 58 min on an average December day.
The nearest other city in this atlas is Kabanjahe (83 km away). In December its highs average 23.7°C, 4.9°C cooler than Subulussalam, with 298 mm of rain.
Among the 200 cities listed in Indonesia, Subulussalam ranks joint 105th of 200 for the warmest December highs and 158th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Subulussalam is 0.2°C warmer than that mean.
From December to January, average highs rise by 0.6°C to 29.2°C, and monthly rainfall falls from 395 mm to 329 mm.
The annual picture
December 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
Subulussalam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C20.9°C | 20.9°C | 329 | 26.3 | 12.012 h |
| February | 29.8°C20.9°C | 20.9°C | 294 | 24.1 | 12.012 h |
| March | 29.8°C21.4°C | 21.4°C | 339 | 28.1 | 12.112 h |
| April | 29.5°C21.8°C | 21.8°C | 368 | 27.3 | 12.212 h |
| May | 29.9°C22.1°C | 22.1°C | 264 | 21.4 | 12.212 h |
| June | 29.9°C21.8°C | 21.8°C | 150 | 16.7 | 12.312 h |
| July | 29.5°C21.4°C | 21.4°C | 160 | 17.7 | 12.312 h |
| August | 29.2°C21.4°C | 21.4°C | 238 | 20.7 | 12.212 h |
| September | 29.1°C21.4°C | 21.4°C | 295 | 22.4 | 12.112 h |
| October | 28.6°C21.3°C | 21.3°C | 419 | 25.9 | 12.112 h |
| November | 28.4°C21.2°C | 21.2°C | 510 | 28.2 | 12.012 h |
| December, selected | 28.6°C21.1°C | 21.1°C | 395 | 27.5 | 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
December in nearby cities
- Kabanjahe in DecemberIndonesia · 83 kmHigh 23.7°C · Low 17.4°C · 298 mm rain
- Binjai in DecemberIndonesia · 124 kmHigh 27.8°C · Low 21.7°C · 345 mm rain
- Sunggal in DecemberIndonesia · 130 kmHigh 28.1°C · Low 22.1°C · 345 mm rain
- Medan in DecemberIndonesia · 134 kmHigh 28.2°C · Low 22.4°C · 302 mm rain
- Pematangsiantar in DecemberIndonesia · 136 kmHigh 26.3°C · Low 20.5°C · 315 mm rain
- Sibolga in DecemberIndonesia · 143 kmHigh 28.6°C · Low 22.8°C · 433 mm rain
- Belawan in DecemberIndonesia · 152 kmHigh 28.4°C · Low 22.9°C · 347 mm rain
- Percut in DecemberIndonesia · 153 kmHigh 28.1°C · Low 23.0°C · 347 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 Subulussalam) is explained once on the Subulussalam year overview and on the Sources, method and limits page.