Monthly Climate
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Best time to visit Vientiane

December is the best time to visit Vientiane for general sightseeing, with average highs of 27 °C and about 1 wet days. The comfortable season runs roughly November to February.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking December comfort 90/100
The least cloud February 27 % average cloud cover
The least rain December 8 mm
Warmth April 34 °C
Cooler weather December 27 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 December 90 27 °C 1
2 January 89 27 °C 2
3 February 81 30 °C 2
4 November 81 29 °C 3
5 March 68 32 °C 6
6 October 64 29 °C 11
7 April 53 34 °C 12
8 September 48 30 °C 24
9 August 47 30 °C 27
10 July 46 30 °C 27
11 June 45 30 °C 25
12 May 43 32 °C 23

When to think twice

May scores lowest with about 23 wet days and highs near 32 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 27.3 °C 11 mm 32 %
February 29.7 °C 14 mm 27 %
March 32.4 °C 38 mm 35 %
April 33.7 °C 76 mm 50 %
May 31.8 °C 257 mm 78 %
June 30.5 °C 312 mm 92 %
July 29.9 °C 375 mm 92 %
August 29.6 °C 409 mm 92 %
September 29.6 °C 306 mm 80 %
October 29.3 °C 100 mm 57 %
November 28.6 °C 21 mm 37 %
December 26.9 °C 8 mm 33 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.