Climate averages 1991–2020
Medan weather
in December.
A hot, very wet month: the coolest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Medan: daytime highs average 28.2°C and nights cool to about 22.4°C. By daytime temperature it is the coolest month of the year.
Expect about 302 mm of rain on roughly 28 days, which makes December a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average December day.
The nearest other city in this atlas is Sunggal (6 km away). In December its highs average 28.1°C, about as warm as Medan, with 345 mm of rain.
Among the 200 cities listed in Indonesia, Medan ranks joint 130th of 200 for the warmest December highs and joint 70th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Medan is 0.2°C cooler than that mean.
From December to January, average highs rise by 0.4°C to 28.7°C, and monthly rainfall falls from 302 mm to 203 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
Medan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.7°C22.1°C | 22.1°C | 203 | 24.7 | 11.912 h |
| February | 29.3°C22.0°C | 22.0°C | 147 | 20.6 | 12.012 h |
| March | 30.0°C22.5°C | 22.5°C | 190 | 23.1 | 12.112 h |
| April | 30.1°C22.9°C | 22.9°C | 243 | 26.0 | 12.212 h |
| May | 30.2°C23.2°C | 23.2°C | 279 | 27.1 | 12.312 h |
| June | 30.2°C22.9°C | 22.9°C | 209 | 22.8 | 12.312 h |
| July | 30.0°C22.6°C | 22.6°C | 217 | 24.0 | 12.312 h |
| August | 29.9°C22.6°C | 22.6°C | 249 | 26.1 | 12.212 h |
| September | 29.5°C22.5°C | 22.5°C | 353 | 28.1 | 12.112 h |
| October | 29.0°C22.5°C | 22.5°C | 393 | 29.5 | 12.012 h |
| November | 28.5°C22.5°C | 22.5°C | 366 | 28.7 | 12.012 h |
| December, selected | 28.2°C22.4°C | 22.4°C | 302 | 27.9 | 11.912 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
- Sunggal in DecemberIndonesia · 6 kmHigh 28.1°C · Low 22.1°C · 345 mm rain
- Binjai in DecemberIndonesia · 20 kmHigh 27.8°C · Low 21.7°C · 345 mm rain
- Belawan in DecemberIndonesia · 21 kmHigh 28.4°C · Low 22.9°C · 347 mm rain
- Percut in DecemberIndonesia · 22 kmHigh 28.1°C · Low 23.0°C · 347 mm rain
- Perbaungan in DecemberIndonesia · 32 kmHigh 28.1°C · Low 23.5°C · 310 mm rain
- Kabanjahe in DecemberIndonesia · 57 kmHigh 23.7°C · Low 17.4°C · 298 mm rain
- Tebingtinggi in DecemberIndonesia · 62 kmHigh 28.1°C · Low 23.1°C · 258 mm rain
- Pematangsiantar in DecemberIndonesia · 82 kmHigh 26.3°C · Low 20.5°C · 315 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 Medan) is explained once on the Medan year overview and on the Sources, method and limits page.