Climate averages 1991–2020
Tanjungbalai weather
in December.
A hot, very wet month: the coolest and the joint 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Tanjungbalai: daytime highs average 28.4°C and nights cool to about 23.9°C. By daytime temperature it is the coolest month of the year.
Expect about 333 mm of rain on roughly 28 days, which makes December a very wet month (the joint 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average December day.
The nearest other city in this atlas is Kisaran (21 km away). In December its highs average 28.5°C, about as warm as Tanjungbalai, with 298 mm of rain.
Among the 200 cities listed in Indonesia, Tanjungbalai ranks joint 116th of 200 for the warmest December highs and joint 101st of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Tanjungbalai is level with that mean.
From December to January, average highs rise by 0.3°C to 28.7°C, and monthly rainfall falls from 333 mm to 215 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
Tanjungbalai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.7°C23.8°C | 23.8°C | 215 | 26.1 | 12.012 h |
| February | 29.3°C24.1°C | 24.1°C | 159 | 22.2 | 12.012 h |
| March | 29.7°C24.5°C | 24.5°C | 192 | 25.5 | 12.112 h |
| April | 29.9°C24.8°C | 24.8°C | 233 | 28.3 | 12.212 h |
| May | 30.1°C25.0°C | 25.0°C | 235 | 27.4 | 12.312 h |
| June | 30.1°C25.0°C | 25.0°C | 171 | 22.5 | 12.312 h |
| July | 29.8°C24.7°C | 24.7°C | 177 | 22.8 | 12.312 h |
| August | 29.7°C24.5°C | 24.5°C | 216 | 25.7 | 12.212 h |
| September | 29.5°C24.2°C | 24.2°C | 282 | 28.2 | 12.112 h |
| October | 29.1°C24.1°C | 24.1°C | 333 | 29.6 | 12.112 h |
| November | 28.7°C24.0°C | 24.0°C | 367 | 29.5 | 12.012 h |
| December, selected | 28.4°C23.9°C | 23.9°C | 333 | 28.4 | 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
- Kisaran in DecemberIndonesia · 21 kmHigh 28.5°C · Low 23.1°C · 298 mm rain
- Pematangsiantar in DecemberIndonesia · 81 kmHigh 26.3°C · Low 20.5°C · 315 mm rain
- Tebingtinggi in DecemberIndonesia · 81 kmHigh 28.1°C · Low 23.1°C · 258 mm rain
- Rantauprapat in DecemberIndonesia · 96 kmHigh 28.6°C · Low 22.5°C · 323 mm rain
- Perbaungan in DecemberIndonesia · 115 kmHigh 28.1°C · Low 23.5°C · 310 mm rain
- Percut in DecemberIndonesia · 127 kmHigh 28.1°C · Low 23.0°C · 347 mm rain
- Medan in DecemberIndonesia · 143 kmHigh 28.2°C · Low 22.4°C · 302 mm rain
- Kabanjahe in DecemberIndonesia · 146 kmHigh 23.7°C · Low 17.4°C · 298 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 Tanjungbalai) is explained once on the Tanjungbalai year overview and on the Sources, method and limits page.