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Climate tables. Data for Vientiane.


Monthly temperature

Month Record low Average low Average Average high Record high
january 3.3 (1955) 18.4 23.1 28.5 36.0 (2020)
february 3.0 (1975) 20.1 25.0 30.7 38.0 (1974)
march 10.0 (1977) 22.9 27.5 33.2 39.6 (2016)
april 16.8 (2018) 25.2 29.3 34.7 41.0 (2013)
may 19.0 (1976) 25.7 28.8 33.5 42.0 (1988)
june 20.0 (1953) 25.8 28.6 32.5 39.5 (2007)
july 19.5 (2005) 25.5 28.1 31.8 39.0 (1979)
august 20.6 (1993) 25.3 27.8 31.5 37.0 (1981)
september 18.8 (1952) 25.0 27.7 31.6 37.5 (1992)
october 16.0 (1994) 24.1 27.3 31.6 36.8 (2019)
november 8.9 (1955) 21.5 25.6 30.6 36.0 (1982)
december 6.1 (1955) 18.6 23.2 28.6 36.0 (1974)
year () ()
graphic

Monthly precipitation

Month Average Record low Record high Daily high
january 9 0.0 (2005) 311 (2013) 2 (2004)
february 18 0.0 (2005) 120 (1964) 54 (2004)
march 43 0.0 (1954) 135 (2008) 46 (2003)
april 91 1.0 (1990) 291 (2013) 18 (2018)
may 219 8 (2019) 520 (1999) 88 (2012)
june 261 25 (2020) 2112 (2013) 97 (2004)
july 282 51 (2018) 635 (1981) 154 (2006)
august 333 66 (2018) 637 (2010) 104 (2004)
september 274 40 (2019) 678 (1959) 99 (2011)
october 100 0.0 (2004) 326 (1941) 42 (2003)
november 15 0.0 (2003) 109 (1953) 3 (2019)
december 5 0.0 (1953) 40 (1999) 1.0 (2018)
year () () ()
graphic

Number of days with solid, liquid, and mixed precipitation

Type of precipitation jan feb mar apr may jun jul aug sep oct nov dec Year

Wind speed, m/s

jan feb mar apr may jun jul aug sep oct nov dec Year

The frequency of different wind directions, %

direction jan feb mar apr may jun jul aug sep oct nov dec Year
graphic graphic graphic graphic

Air humidity, %

jan feb mar apr may jun jul aug sep oct nov dec Year

Snow cover

Month jul aug sep oct nov dec jan feb mar apr may jun Year
number of days
height (sm)  
max height (sm)

Cloudy, score

month jan feb mar apr may jun jul aug sep oct nov dec Year
total
low

Number of clear, cloudy and cloudy days

month jan feb mar apr may jun jul aug sep oct nov dec Year
Total cloud
Low cloud

Number of days with different phenomena

phenomenon jan feb mar apr may jun jul aug sep oct nov dec Year

The frequency of different types of clouds, %

type of clouds jan feb mar apr may jun jul aug sep oct nov dec Year