Climate averages 1991–2020
Watthana weather
in December.
A hot, very dry month: the 11th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Watthana: daytime highs average 30.4°C and nights cool to about 21.7°C. By daytime temperature it is the 11th warmest of the 12 months.
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 Bangkok (9 km away). In December its highs average 30.6°C, about as warm as Watthana, with 9.5 mm of rain.
Among the 46 cities listed in Thailand, Watthana ranks joint 19th 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; Watthana is 0.8°C warmer than that mean.
From December to January, average highs rise by 0.4°C to 30.8°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
Watthana climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.8°C21.9°C | 21.9°C | 15 | 2.9 | 11.411 h |
| February | 31.9°C23.6°C | 23.6°C | 13 | 2.8 | 11.712 h |
| March | 33.1°C25.5°C | 25.5°C | 41 | 6.3 | 12.012 h |
| April | 34.1°C26.7°C | 26.7°C | 68 | 10.3 | 12.412 h |
| May | 33.0°C26.6°C | 26.6°C | 130 | 20.0 | 12.813 h |
| June | 32.0°C26.3°C | 26.3°C | 127 | 21.8 | 12.913 h |
| July | 31.4°C25.9°C | 25.9°C | 134 | 22.9 | 12.913 h |
| August | 31.1°C25.6°C | 25.6°C | 144 | 23.6 | 12.613 h |
| September | 30.7°C25.1°C | 25.1°C | 237 | 25.3 | 12.212 h |
| October | 30.3°C24.2°C | 24.2°C | 191 | 20.7 | 11.812 h |
| November | 30.7°C23.2°C | 23.2°C | 42 | 6.4 | 11.512 h |
| December, selected | 30.4°C21.7°C | 21.7°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
- Bangkok in DecemberThailand · 9 kmHigh 30.6°C · Low 21.7°C · 9.5 mm rain
- Phra Pradaeng in DecemberThailand · 10 kmHigh 30.5°C · Low 21.9°C · 9.5 mm rain
- Ban Khlong Prawet in DecemberThailand · 10 kmHigh 30.5°C · Low 21.7°C · 9.7 mm rain
- Bueng Kum in DecemberThailand · 11 kmHigh 30.6°C · Low 21.5°C · 9.7 mm rain
- Chatuchak in DecemberThailand · 11 kmHigh 30.5°C · Low 21.5°C · 9.5 mm rain
- Thung Khru in DecemberThailand · 14 kmHigh 30.2°C · Low 22.3°C · 9.5 mm rain
- Samut Prakan in DecemberThailand · 15 kmHigh 30.3°C · Low 22.3°C · 9.5 mm rain
- Mueang Nonthaburi in DecemberThailand · 16 kmHigh 30.8°C · Low 21.6°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 Watthana) is explained once on the Watthana year overview and on the Sources, method and limits page.
Bangkok, Mueang Nonthaburi and Phra Pradaeng lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.