Vientiane Weather in December
Average highs run from 28°C on December 1 to 28°C on December 31, and lows from 17°C to 15°C. Normal precipitation for the month is 6 mm over about 0 wet days.
December day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
December at a glance
- Average high
- 27°C
- Average low
- 15°C
- Precipitation
- 6 mm
- Reanalysis high
- 35°CDec 17, 2012
- Reanalysis low
- 3°CDec 25, 1999
- Daylight
- 11 h 09 min to 11 h 05 min
- Cloud cover
- 36%
- Humidity
- 72%
- Dew point
- 14°C
- Wind
- 9.0 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 28°C | 17°C | 34°C 2012 | 10°C 1992 | 4% |
| Dec 2 | 28°C | 16°C | 34°C 2015 | 8°C 1992 | 4% |
| Dec 3 | 28°C | 16°C | 33°C 1998 | 9°C 1992 | 3% |
| Dec 4 | 28°C | 16°C | 32°C 2012 | 11°C 2019 | 3% |
| Dec 5 | 28°C | 16°C | 33°C 2012 | 11°C 2020 | 3% |
| Dec 6 | 28°C | 16°C | 32°C 2006 | 8°C 2019 | 2% |
| Dec 7 | 28°C | 16°C | 33°C 2006 | 7°C 2019 | 2% |
| Dec 8 | 27°C | 16°C | 34°C 2006 | 6°C 2019 | 2% |
| Dec 9 | 27°C | 16°C | 32°C 2006 | 8°C 2019 | 3% |
| Dec 10 | 27°C | 15°C | 32°C 2009 | 9°C 2019 | 2% |
| Dec 11 | 27°C | 15°C | 32°C 2009 | 8°C 2011 | 2% |
| Dec 12 | 27°C | 15°C | 33°C 2009 | 9°C 2011 | 2% |
| Dec 13 | 27°C | 15°C | 34°C 2015 | 11°C 1998 | 2% |
| Dec 14 | 27°C | 15°C | 34°C 2015 | 11°C 2014 | 2% |
| Dec 15 | 27°C | 15°C | 34°C 2009 | 11°C 2005 | 2% |
| Dec 16 | 27°C | 15°C | 35°C 2012 | 10°C 2005 | 2% |
| Dec 17 | 27°C | 15°C | 35°C 2012 | 9°C 2013 | 2% |
| Dec 18 | 27°C | 15°C | 35°C 2012 | 8°C 2013 | 2% |
| Dec 19 | 27°C | 14°C | 33°C 1997 | 6°C 2017 | 2% |
| Dec 20 | 27°C | 14°C | 34°C 1997 | 6°C 2017 | 3% |
| Dec 21 | 27°C | 14°C | 34°C 2012 | 6°C 2017 | 3% |
| Dec 22 | 27°C | 14°C | 35°C 2007 | 4°C 1999 | 3% |
| Dec 23 | 27°C | 14°C | 35°C 2007 | 3°C 1999 | 3% |
| Dec 24 | 27°C | 14°C | 34°C 2015 | 3°C 1999 | 3% |
| Dec 25 | 27°C | 14°C | 34°C 2009 | 3°C 1999 | 3% |
| Dec 26 | 27°C | 14°C | 34°C 2009 | 4°C 1999 | 4% |
| Dec 27 | 27°C | 14°C | 35°C 2009 | 6°C 1999 | 4% |
| Dec 28 | 27°C | 14°C | 32°C 2012 | 7°C 1993 | 4% |
| Dec 29 | 27°C | 14°C | 34°C 2012 | 8°C 2013 | 4% |
| Dec 30 | 27°C | 14°C | 32°C 2009 | 8°C 1995 | 5% |
| Dec 31 | 28°C | 15°C | 33°C 2009 | 8°C 1995 | 6% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+7).
- December 1
- sunrise 6:24 AM, sunset 5:33 PM
- December 31
- sunrise 6:40 AM, sunset 5:45 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.