Climate averages 1991–2020
Ban Samae Dam weather
in December.
A hot, very dry month: one of the coolest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Ban Samae Dam: daytime highs average 30.1°C and nights cool to about 22.4°C. By daytime temperature it is one of the coolest months of the year.
Expect about 9.5 mm of rain on roughly 2 days, which makes December a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 20 min on an average December day.
The nearest other city in this atlas is Bang Khae (12 km away). In December its highs average 30.6°C, about as warm as Ban Samae Dam, with 9.5 mm of rain.
Among the 46 cities listed in Thailand, Ban Samae Dam ranks joint 25th of 46 for the warmest December highs and joint 13th of 46 for the driest December (rainfall, lowest first). The mean December high of those 46 cities is 29.6°C; Ban Samae Dam is 0.5°C warmer than that mean.
From December to January, average highs rise by 0.3°C to 30.4°C, and monthly rainfall rises from 9.5 mm to 15 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
Ban Samae Dam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.4°C22.6°C | 22.6°C | 15 | 3.0 | 11.411 h |
| February | 31.5°C24.3°C | 24.3°C | 12 | 2.6 | 11.712 h |
| March | 32.7°C26.1°C | 26.1°C | 38 | 5.9 | 12.012 h |
| April | 33.8°C27.3°C | 27.3°C | 67 | 9.7 | 12.412 h |
| May | 32.8°C27.1°C | 27.1°C | 124 | 18.2 | 12.713 h |
| June | 31.9°C26.6°C | 26.6°C | 100 | 20.0 | 12.913 h |
| July | 31.3°C26.2°C | 26.2°C | 107 | 20.9 | 12.813 h |
| August | 31.0°C26.0°C | 26.0°C | 114 | 21.6 | 12.613 h |
| September | 30.5°C25.5°C | 25.5°C | 212 | 24.4 | 12.212 h |
| October | 30.1°C24.7°C | 24.7°C | 208 | 21.0 | 11.812 h |
| November | 30.4°C23.8°C | 23.8°C | 43 | 6.2 | 11.512 h |
| December, selected | 30.1°C22.4°C | 22.4°C | 9.5 | 1.7 | 11.311 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
- Bang Khae in DecemberThailand · 12 kmHigh 30.6°C · Low 22.1°C · 9.5 mm rain
- Nong Khaem in DecemberThailand · 14 kmHigh 30.6°C · Low 22.1°C · 11 mm rain
- Thung Khru in DecemberThailand · 14 kmHigh 30.2°C · Low 22.3°C · 9.5 mm rain
- Phra Pradaeng in DecemberThailand · 18 kmHigh 30.5°C · Low 21.9°C · 9.5 mm rain
- Thawi Watthana in DecemberThailand · 22 kmHigh 30.7°C · Low 21.9°C · 9.5 mm rain
- Bangkok in DecemberThailand · 22 kmHigh 30.6°C · Low 21.7°C · 9.5 mm rain
- Samut Prakan in DecemberThailand · 23 kmHigh 30.3°C · Low 22.3°C · 9.5 mm rain
- Watthana in DecemberThailand · 26 kmHigh 30.4°C · Low 21.7°C · 9.5 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 Ban Samae Dam) is explained once on the Ban Samae Dam year overview and on the Sources, method and limits page.
Samut Prakan lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.