Bangkok in December

When to go

The World Meteorological Organization's climate normals for Bangkok list high daytime temperatures, mild nights and very few rain days for December. The Bank of Thailand's holiday notice lists a substitution holiday for the birthday of King Bhumibol Adulyadej the Great, which is also National Day and Father's Day, along with Constitution Day and New Year's Eve, so check opening hours for anything on your list around those dates.

Trip facts

• The World Meteorological Organization's World Weather Information Service lists the Thai Meteorological Department's 1961-1990 climate normals for Bangkok with a mean daily maximum temperature of 31.3 °C (88.3 °F) and a mean daily minimum temperature of 20.8 °C (69.4 °F) in December. (worldweather.wmo.int, checked 2026-10-15)
• The World Meteorological Organization's World Weather Information Service lists the Thai Meteorological Department's 1961-1990 climate normals for Bangkok with mean total precipitation of 10.0 mm and a mean of 1.0 precipitation days (days with at least 1 mm of precipitation) in December. (worldweather.wmo.int, checked 2026-10-15)
• The Bank of Thailand's Notification No. 31/2568 lists, among financial institutions' holidays for 2026, Monday 7 December as the substitution for H.M. King Bhumibol Adulyadej the Great's Birthday, National Day and Father's Day (Saturday 5th December 2026), Thursday 10 December as Constitution Day and Thursday 31 December as New Year's Eve. (www.bot.or.th, checked 2026-10-15)
• The Tourism Authority of Thailand's newsroom says a new framework replaces Thailand's 60-day visa exemption measure on 15 September 2026, and that holders of passports or travel documents from 60 countries and territories, on a Royal Gazette list that includes the United States of America, are eligible for visa exemption for tourism with a permitted stay of up to 30 days. (www.tatnews.org, checked 2026-10-15)
• The Thai Immigration Bureau's Thailand Digital Arrival Card (TDAC) FAQ says the card should be submitted within 3 days in advance of arriving in Thailand (including the date of arrival), and that all non-Thai nationals are required to submit their traveling information prior to their arrival in the Kingdom of Thailand. (tdac.immigration.go.th, checked 2026-10-15)
• Airports of Thailand's Suvarnabhumi Airport transportation guide says the Airport Rail Link station is located on Level B1 of the main terminal, with operating hours of 05:30-24:00. (suvarnabhumi.airportthai.co.th, checked 2026-10-15)
• Airports of Thailand's Suvarnabhumi Airport transportation guide lists an airport shuttle bus between Suvarnabhumi Airport and Don Mueang Airport with operating hours of 05:00-24:00, a frequency of every 30 minutes and a fare listed as 'Free of charge', exclusively available for passengers transferring between Suvarnabhumi and Don Mueang airports. (suvarnabhumi.airportthai.co.th, checked 2026-10-15)
• The BTS Skytrain's timetable page lists service hours of 05:00 - 01:00 hrs. (www.bts.co.th, checked 2026-10-15)
• The Bangkok Expressway and Metro (BEM) MRT site lists the MRT Blue Line's total distance as 48 kilometers across 38 stations. (metro.bemplc.co.th, checked 2026-10-15)
• Airports of Thailand's Suvarnabhumi Airport guide says its Guidelines for Checked Baggage Inspection take effect on October 16, 2026, and that spare lithium batteries or power banks are strictly prohibited in checked baggage and must be carried in cabin baggage only, subject to specified capacity limits. (suvarnabhumi.airportthai.co.th, checked 2026-10-15)