Climate averages 1991–2020
Batam weather
in December.
A warm, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Batam: daytime highs average 27.3°C and nights cool to about 25.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 298 mm of rain on roughly 25 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 03 min on an average December day.
The nearest other city in this atlas is Ulu Bedok (23 km away). In December its highs average 27.9°C, 0.7°C warmer than Batam, with 299 mm of rain.
Among the 200 cities listed in Indonesia, Batam ranks joint 170th of 200 for the warmest December highs and joint 63rd of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Batam is 1.2°C cooler than that mean.
From December to January, average highs fall by 0.1°C to 27.2°C, and monthly rainfall falls from 298 mm to 199 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
Batam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.2°C25.1°C | 25.1°C | 199 | 19.1 | 12.112 h |
| February | 27.7°C25.4°C | 25.4°C | 98 | 13.0 | 12.112 h |
| March | 28.2°C25.6°C | 25.6°C | 145 | 19.8 | 12.112 h |
| April | 28.5°C25.9°C | 25.9°C | 182 | 25.2 | 12.112 h |
| May | 28.5°C26.2°C | 26.2°C | 210 | 26.4 | 12.212 h |
| June | 28.5°C26.4°C | 26.4°C | 193 | 22.8 | 12.212 h |
| July | 28.1°C26.2°C | 26.2°C | 187 | 22.9 | 12.212 h |
| August | 28.0°C26.1°C | 26.1°C | 164 | 22.3 | 12.212 h |
| September | 28.1°C26.0°C | 26.0°C | 148 | 19.9 | 12.112 h |
| October | 28.0°C25.6°C | 25.6°C | 190 | 23.8 | 12.112 h |
| November | 27.6°C25.3°C | 25.3°C | 290 | 27.8 | 12.112 h |
| December, selected | 27.3°C25.2°C | 25.2°C | 298 | 24.8 | 12.112 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
- Ulu Bedok in DecemberSingapore · 23 kmHigh 27.9°C · Low 24.6°C · 299 mm rain
- Singapore in DecemberSingapore · 25 kmHigh 27.7°C · Low 24.9°C · 267 mm rain
- Pasir Gudang in DecemberMalaysia · 37 kmHigh 28.2°C · Low 24.0°C · 327 mm rain
- Jurong Town in DecemberSingapore · 39 kmHigh 28.0°C · Low 24.4°C · 267 mm rain
- Woodlands in DecemberSingapore · 41 kmHigh 27.9°C · Low 24.4°C · 313 mm rain
- Johor Bahru in DecemberMalaysia · 46 kmHigh 28.3°C · Low 23.8°C · 313 mm rain
- Iskandar Puteri in DecemberMalaysia · 52 kmHigh 28.0°C · Low 24.4°C · 270 mm rain
- Tanjung Pinang in DecemberIndonesia · 55 kmHigh 27.4°C · Low 25.1°C · 340 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 Batam) is explained once on the Batam year overview and on the Sources, method and limits page.