Annual mean 27°C · wettest around May · prevailing wind SE
Warmest
34.0 °C
Coldest
26.2 °C
Wettest
91%
Windiest
2.4 m/s
Prevailing
SE
2.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Vientiane over the whole year is 27°C. April is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 18°C. The rainy (wet) season in Vientiane runs from February to October, peaking in May with a 85% chance of rain on a given day. The dry season is November to January; December is the driest month, at 50%. Winds in Vientiane are highest in February, averaging 1.6 m/s (6 km/h), and lightest in June, at 1.4 m/s (5 km/h). The prevailing wind is from the SE. The clearest skies in Vientiane come in February, when the sky is typically 32% covered; August is the cloudiest month, at 79%.
Month by month Vientiane climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
27°C
18°C
28°C
57%
37%
1.5 m/s
37
67
14
February
28°C
19°C
30°C
78%
32%
1.6 m/s
31
55
11
March
31°C
22°C
34°C
78%
38%
1.5 m/s
9
32
2
April
33°C
25°C
37°C
82%
48%
1.6 m/s
3
16
1
May
33°C
25°C
37°C
85%
65%
1.6 m/s
1
10
0
June
31°C
26°C
36°C
81%
74%
1.4 m/s
0
10
0
July
31°C
25°C
36°C
82%
77%
1.5 m/s
1
15
0
August
30°C
25°C
35°C
81%
79%
1.4 m/s
1
17
0
September
30°C
25°C
35°C
81%
71%
1.4 m/s
1
16
0
October
31°C
24°C
34°C
79%
58%
1.5 m/s
3
28
0
November
30°C
21°C
33°C
64%
43%
1.4 m/s
8
51
1
December
27°C
18°C
28°C
50%
34%
1.5 m/s
38
61
14
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Vientiane weather by season
Year round, Vientiane has days of about 27°C at their warmest in January, its coolest month, and 33°C in April, its warmest; the coolest hours of the day run from 18°C to 26°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around May and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Vientiane weather in winterDecember to February
High 27°CLow 18°CRain 61%
Winter in Vientiane has typical daily highs of about 27°C and lows of about 18°C, with a 61% chance of rain on a given day.
Vientiane weather in springMarch to May
High 32°CLow 24°CRain 82%
Spring in Vientiane has typical daily highs of about 32°C and lows of about 24°C, with a 82% chance of rain on a given day.
Vientiane weather in summerJune to August
High 31°CLow 25°CRain 81%
Summer in Vientiane has typical daily highs of about 31°C and lows of about 25°C, with a 81% chance of rain on a given day.
Vientiane weather in autumnSeptember to November
High 30°CLow 23°CRain 75%
Autumn in Vientiane has typical daily highs of about 30°C and lows of about 23°C, with a 75% chance of rain on a given day.
When is the rainy season in Vientiane?
The rainy (wet) season in Vientiane runs from February to October, peaking in May with a 85% chance of rain on a given day. The dry season is November to January; December is the driest month, at 50%.
What time of year is Vientiane windiest?
Winds in Vientiane are highest in February, averaging 1.6 m/s (6 km/h), and lightest in June, at 1.4 m/s (5 km/h). The prevailing wind is from the SE.
What is the average temperature in Vientiane year round?
The average temperature in Vientiane over the whole year is 27°C. April is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 18°C.