Vientiane monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Vientiane

Vientiane average temperature chart (Celsius) Vientiane average temperature chart (Fahrenheit)
Average monthly temperatures in Vientiane (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 29.1 31.4 34.1 35.5 33.5 32.5 32 31.4 31.5 31.1 29.9 28.3
°F 84.3 88.5 93.4 95.8 92.3 90.4 89.6 88.6 88.6 88.1 85.9 83

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Vientiane monthly rainfall chart (mm) Vientiane monthly rainfall chart (inches)
Average monthly rainfall in Vientiane (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 7 12 31 90 236 271 245 332 278 81 12 4
inches 0.3 0.5 1.2 3.5 9.3 10.7 9.6 13.1 10.9 3.2 0.5 0.1
Rainy days 3 3 6 10 18 21 21 24 20 10 3 2

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Vientiane

Vientiane average daily sunshine chart
Average daily sunshine Vientiane
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.9 8.5 7.9 8.2 7.1 5.5 5.3 4.9 5.4 8.1 8.4 8.9

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Vientiane average minimum / maximum temperatures (Celsius) Vientiane average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Vientiane (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 16 18.3 21.2 23.7 24.3 24.8 24.6 24.4 24 22.7 19.4 15.8
Max °C 29.4 31.7 34.5 35.8 33.8 32.7 32.2 31.6 31.7 31.4 30.2 28.7
Min °F 60.8 64.9 70.1 74.6 75.7 76.6 76.3 75.9 75.1 72.8 66.9 60.4
Max °F 72.9 77 82 85.5 84.2 83.7 83.1 82.4 82 80.6 76.6 72

Sea temperature

The graph below shows the average sea temperature.

Vientiane average sea temperature chart (Celsius) Vientiane average sea temperature chart (Fahrenheit)
Average sea temperature around Vientiane in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 24.3 24.1 24.9 26.5 28.5 29.5 29.4 29.3 29.1 28.6 27.4 25.5
°F 75.7 75.3 76.8 79.7 83.3 85 84.8 84.7 84.3 83.4 81.4 77.9

Wind speed

The graph below shows the average wind speed.

Vientiane average winspeed by month (km/h) Vientiane average winspeed by month (mph)
Average wind speed in Vientiane (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 5 5 5 5 5 5 5 5 4 4 5 4
mph 3 3 3 3 3 3 3 3 3 3 3 3

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Vientiane relative humidity averages
Average relative humidity in Vientiane
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
69% 67% 65% 68% 78% 82% 82% 84% 83% 78% 72% 70%

Other monthly averages

UV index Best time to go?

Vientiane weather stats

Vientiane weather statistics
Hottest month: April 35.5°C 95.9°F
Driest month: December 4mm 0.2ins
Sunniest month: December 8.9hrs
Coldest month: December 28.3°C 82.9°F
Wettest month: August 332mm 13.1ins
Warmest sea: June 29.5°C 85.1°F
Map showing location of Vientiane (17.96667, 102.6)

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