Bangkok in December
In December, Bangkok has a daily high of 31.6 °C (88.9 °F) and a daily low of 21.9 °C (71.4 °F), as 1991-2020 model estimates; figures in brackets are converted. The daily high is a model estimate, adjusted against station records. There is no data for rain: Not published: the model failed our station test in tropical cities.
Last updated : back, with ERA5-Land model estimates.
Best time to visit Bangkok: December misses our rule: days are 3.6 °C over our 28 °C (model estimates).
What December is like in Bangkok
- Flowers and blooms fill every part of Suan Luang Rama IX Park for its yearly flower show, held in early December. There is an ornamental plant contest too. Source: TAT Newsroom (Tourism Authority of Thailand), checked .
- In December, migrant birds from northern Asia join the birds of Benjakitti Park, among them Yellow-browed Warblers and Asian Brown Flycatchers. Source: The Siam Society, checked .
- Hymns rise at Mass on Christmas Eve in December. Thai Christians gather at Assumption Cathedral in Bangkok to pray and sing. Source: Thailand Foundation, checked .
Key figures
Weather in December, 1991-2020 model estimates
- Daily high
- 31.6 °C (88.9 °F)
- Daily low
- 21.9 °C (71.4 °F)
- Rain
- no data
- Sunshine
- no data
Model estimate 1991-2020, not a weather station: ERA5-Land model estimates (Copernicus), computed by City by Month for the grid cell nearest the city. Daily high: model estimate, adjusted against station records. Licence: CC BY 4.0. Checked . How we make and test model estimates
Model estimate for the ERA5-Land grid cell at 13.7° N, 100.5° E, 6 km from the city centre point.
How we define and convert these figures
Notes. Rain: Not published: the model failed our station test in tropical cities. Sunshine: Not in our ERA5-Land estimates.
Daylight on 15 December 2026
- Sunrise
- 06:33 local time
- Sunset
- 17:53 local time
- Day length
- 11 h 19 min
Day length 1-31 December: 11 h 23 min to 11 h 20 min, -3 min.
Source: NOAA Solar Calculator equations, checked .
Month by month
Each month: daily high in °C, 1991-2020 model estimates. Rain: no data.
ERA5-Land model estimates 1991-2020, as above, checked .
This month against the year
| Measure | December | Rank |
|---|---|---|
| Daily high | 31.6 °C | 2nd coldest |
| Daily low | 21.9 °C | coldest |
| Rain | no data | no data |
| Sunshine | no data | no data |
| Day length | 11 h 19 min | shortest |
Equal values share a rank. How we rank months
ERA5-Land model estimates 1991-2020, as above, checked .
Day length: NOAA solar equations, checked .
Public holidays this month
| Date | Holiday |
|---|---|
| Saturday | HM King Bhumibol Adulyadej the Great's Birthday; National Day; National Father's Day (A Saturday. The Monday after is the day off) |
| Monday | HM King Bhumibol Adulyadej the Great's Birthday (in lieu); National Day (in lieu); National Father's Day (in lieu) |
| Thursday | Constitution Day |
| Thursday | New Year’s Eve |
Typed from the official list and re-checked, .
December 2027: no data. No government list for 2027 yet.
English names are from the holidays library where the official list gives none. How we check holidays
Source: Official public holiday list (soc.go.th), checked ; holidays Python library, checked . Library: holidays 0.105.
Same month in 8 model-estimate cities
Bangkok is warmer than 7 of our 8 model-estimate cities in December by mean daily high. How we rank cities
Closest high and low in December: Mumbai (1.0 °C apart), Sydney (4.9), Melbourne (8.1).
| City | Gap from Bangkok, °C | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|---|
| Bangkok (this page) | — | 31.6 | 21.9 | no data | no data |
| Mumbai (closest) | 1.0 | 31.4 | 20.2 | no data | no data |
| Sydney (closest) | 4.9 | 25.6 | 18.1 | 62.5 | no data |
| Melbourne (closest) | 8.1 | 24.4 | 12.9 | 64.0 | no data |
| Delhi | 10.5 | 23.2 | 9.3 | no data | no data |
| Lisbon | 13.6 | 15.8 | 10.5 | 77.9 | no data |
| Porto | 15.7 | 14.7 | 7.5 | 150.9 | no data |
| Istanbul | 18.2 | 11.1 | 6.0 | 99.3 | no data |
Sources (1991-2020): ERA5-Land model estimates, checked . Each city's page names its grid cell. All sources in full on Methodology.
Sources
- Attribution: Copernicus Climate Change Service (2025): ERA5 Land hourly time-series data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/ee82e357. Accessed on the check date shown. Generated using or contains modified Copernicus Climate Change Service information 2025. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Licence: CC BY 4.0. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
- holidays Python library, run locally. Attribution: holidays library, Vacanza team. Licence: MIT. Checked .
Official sources
- Official public holiday list (soc.go.th). Checked .
Cite this page: City by Month. "Bangkok in December: weather, daylight, holidays". https://citybymonth.com/cities/thailand/bangkok/december/. Last updated 8 November 2026.