December · Laos
Best time to visit Si Phan Don in December Weather, crowds & prices
Weather in Si Phan Don in December
Average temperature 25°C, 15 mm of rain, about 29 days with 6+ hours of sunshine and 64% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
9.5/10
Ranked #2 of 12 months
- Avg temp
- 25°C
- Rainfall
- 15 mm
- Humidity
- 64%
- Days with 6h+ sun
- 29
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
December in Si Phan Don scores 9.5/10 for nature and wildlife travel - one of the top 12-month picks (#2). Expect around 25°C, 15 mm of rain, and roughly 29 days with 6+ hours of sunshine this month.
A tranquil archipelago of river islands on the Mekong in southern Laos, perfect during the dry season.
December in Si Phan Don — one of the year's strongest windows (2nd)
December averages 25°C (76°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 29 days with 6+ hours of sunshine and 11.3 daylight hours.
A 9.5/10 puts this among the year's best months in Si Phan Don (2nd of 12); only January scores higher, at 9.6/10.
Pack light clothing, a hat and real sun protection, footwear you can get muddy.
Plan for peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Si Phan Don in December?
- In December, Si Phan Don averages 25°C, 15 mm of rain, and about 29 days with 6+ hours of sunshine. Its climate-comfort score is 9.5/10.
- Is December a good time to visit Si Phan Don?
- December earns a 9.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Si Phan Don in December?
- Expect about 15 mm of rain in December. Average humidity is 64% and there are about 29 days with 6+ hours of sunshine.
Curated in Si Phan Don
Tickets & experiences
Things to do in Si Phan Don
Si Phan Don, Laos. Live activities and tours from GetYourGuide, matched to this destination.