Laos Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
CwaHumid subtropical, dry winterTemperate7 Houaphan Louang Namtha Louangphabang Oudômxai Phôngsali Xaisômboun Xiangkhouang
AwTropical wet and dry or savannaTropical6 Bokèo Bolikhamxai Champasak Savannakhét Vientiane Xaignabouli
AmTropical monsoonTropical4 Attapu Khammouan Salavan Xékong

Summary: Most regions (7) in Laos lie in the Humid subtropical, dry winter climate zone (Köppen: Cwa). The mean average of annual temperatures range from a high of 28.39°C (83.1°F) in Vientiane to a low of 21.61°C (70.9°F) in Houaphan.

Climate Laos: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)31.27(88.29)33.78(92.8)35.87(96.57)37.48(99.46)35.33(95.59)32.43(90.37)30.9(87.62)30.63(87.13)31.25(88.25)30.83(87.49)30.86(87.55)30.17(86.31)37.48(99.46)
Average high °C (°F)26.63(79.93)29.93(85.87)32.75(90.95)33.68(92.62)32.32(90.18)30.06(86.11)28.59(83.46)28.58(83.44)29.52(85.14)29.02(84.24)28.27(82.89)26.09(78.96)29.62(85.32)
Daily mean °C (°F)21.21(70.18)24.12(75.42)27.58(81.64)29.2(84.56)28.65(83.57)27.02(80.64)25.76(78.37)25.59(78.06)26.01(78.82)24.96(76.93)23.68(74.62)20.95(69.71)25.39(77.7)
Average low °C (°F)13.13(55.63)14.77(58.59)18.6(65.48)21.03(69.85)21.85(71.33)21.71(71.08)21.12(70.02)20.83(69.49)20.25(68.45)18.16(64.69)16.34(61.41)13.21(55.78)18.42(65.16)
Record low °C (°F)7.94(46.29)9.13(48.43)13.29(55.92)17.02(62.64)18.2(64.76)18.58(65.44)18.36(65.05)18.02(64.44)17.09(62.76)14.68(58.42)11.76(53.17)8.39(47.1)7.94(46.29)
Average precipitation mm (inches)15.86(0.62)6.62(0.26)26.1(1.03)64.59(2.54)146.53(5.77)184.43(7.26)245.13(9.65)295.09(11.62)191.45(7.54)95.56(3.76)26.47(1.04)12.14(0.48)109.16(4.3)
Average precipitation days (≥ 1.0 mm)3.041.876.0113.2721.1523.6726.4826.2122.1313.026.352.4813.81
Average relative humidity (%)72.3260.7453.4459.4471.7881.5886.987.784.3380.0377.4174.8474.21
Mean monthly sunshine hours8.4910.6611.3712.3312.3111.7710.9310.8910.689.258.88.2610.48

Laos Climate Graph

Laos

Laos’s Cities by Temperature

Laos’s states/regions ranking by average yearly temperature:

Vientiane
28.39°C | 83.1°F
Savannakhét
28.01°C | 82.42°F
Champasak
27.89°C | 82.2°F
Khammouan
27.73°C | 81.91°F
Bolikhamxai
27.73°C | 81.91°F
Attapu
26.6°C | 79.88°F
Xékong
26.44°C | 79.59°F
Salavan
26.41°C | 79.54°F
Bokèo
25.65°C | 78.17°F
Xaignabouli
25.01°C | 77.02°F
Louangphabang
24.93°C | 76.87°F
Xaisômboun
24.93°C | 76.87°F
Oudômxai
23.14°C | 73.65°F
Phôngsali
22.7°C | 72.86°F
Louang Namtha
22.55°C | 72.59°F
Xiangkhouang
21.98°C | 71.56°F
Houaphan
21.61°C | 70.9°F

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