Kanchanaburi (River Kwai) weather in December
December in Kanchanaburi: sweltering, dry — one of the best months to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#1 of 12 months in Kanchanaburi · #455 of 1413 destinations to visit in December · comfort 80/100 (tier A)
- Days
- 32°C
- Nights
- 21°C
- Wet days
- 2
- Sun
- 9.8 h
- Humidity
- 63%
- Daylight
- 11 h
Traveller notes on Kanchanaburi in December
Forum posters describe December days here as warm enough to relax by the pool, with cooler mornings typically warming up comfortably by afternoon. This tracks the broader central-Thailand pattern posters describe for the month: hot, sunny days around 32C, clear skies and minimal rain, with evening temperatures dipping into the low-20s or even high-teensC for a genuinely comfortable night. Posters recommend Kanchanaburi's surrounding national parks and dams as worthwhile day-trip additions to the town's famous WWII-era sites, with December's dry, clear conditions well suited to the outdoor sightseeing involved.
Other months in Kanchanaburi
Kanchanaburi's forum makes a genuine case for June despite it being rainy season: multiple posters said it's actually a favorite time to visit specifically because the countryside turns lush and green without the seasonal haze that dulls the dry months. The rain pattern is an hour or so of showers that cools things down, then the rest of the day is fine - not the all-day washout the 'rainy season' label suggests. Hot and humid is still the baseline, the rain is more relief than obstacle.
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Kanchanaburi climate normals — December
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kanchanaburi in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsCool, dry season, River Kwai Bridge Week, school holidays in 5 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Kanchanaburi's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherKanchanaburi's weather peaks November–January, best around December.
December includes Erawan falls at full flow.
Best weatherFair weatherToughest weather
What's on in Kanchanaburi in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Erawan falls at full flow
15 Sep – 31 Dec · usuallyHigh waterThe seven tiers run hardest at the end of the rains, when the upper pools are loud and the turquoise is at its strongest. By April the top levels are a trickle over dry rock.
- Season
Cool, dry season
1 Nov – 20 Feb · usuallyCrowdedThe window that makes the province work: raft houses on the Kwai without the humidity, the war sites bearable in daylight, and the road to the western parks dry.
- Festival
River Kwai Bridge Week
25 Nov – 10 Dec · usuallyMajor festivalCrowdedBook earlyA carnival sets up beside the bridge each year and a light-and-sound show re-enacts the wartime bombing after dark. Rooms in town go early and the riverfront road shuts for it. Source ↗
Nearby, and something's on
Within 300 km of Kanchanaburi — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Kanchanaburi?
Kanchanaburi in December — FAQ
- Is December a good time to visit Kanchanaburi?
- December in Kanchanaburi: sweltering, dry — one of the best months to visit. It ranks #1 of 12 months for Kanchanaburi on SeasonMap's comfort score (80/100).
- What is the weather like in Kanchanaburi in December?
- In December, Kanchanaburi averages a daily high of 32.2°C and a low of 20.5°C, with about 8.5 mm of rain over roughly 2.1 rainy days.
- What is the air quality in Kanchanaburi in December?
- Kanchanaburi has a mean US Air Quality Index of about 63 in December.
Within 300 km: Pattaya's Gulf dry season around 1 Nov – 30 Apr, and Bangkok's Dry days on Buddhist holy days on 1 Jan – 31 Dec.