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Vientiane Climate Guide
Laos
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Maximum Daytime Temperature (°C)
Minimum Night-time Temperature (°C)
29
29 °C (84°F) Maximum Daytime Temperature in January
32
32 °C (90°F) Maximum Daytime Temperature in February
35
35 °C (95°F) Maximum Daytime Temperature in March
36
36 °C (97°F) Maximum Daytime Temperature in April
34
34 °C (93°F) Maximum Daytime Temperature in May
33
33 °C (91°F) Maximum Daytime Temperature in June
32
32 °C (90°F) Maximum Daytime Temperature in July
32
32 °C (90°F) Maximum Daytime Temperature in August
32
32 °C (90°F) Maximum Daytime Temperature in September
31
31 °C (88°F) Maximum Daytime Temperature in October
30
30 °C (86°F) Maximum Daytime Temperature in November
29
29 °C (84°F) Maximum Daytime Temperature in December
J F M A M J J A S O N D
16
16 °C (61°F) Minimum Night-time Temperature in January
18
18 °C (64°F) Minimum Night-time Temperature in February
21
21 °C (70°F) Minimum Night-time Temperature in March
24
24 °C (75°F) Minimum Night-time Temperature in April
24
24 °C (75°F) Minimum Night-time Temperature in May
25
25 °C (77°F) Minimum Night-time Temperature in June
25
25 °C (77°F) Minimum Night-time Temperature in July
24
24 °C (75°F) Minimum Night-time Temperature in August
24
24 °C (75°F) Minimum Night-time Temperature in September
23
23 °C (73°F) Minimum Night-time Temperature in October
19
19 °C (66°F) Minimum Night-time Temperature in November
16
16 °C (61°F) Minimum Night-time Temperature in December
J F M A M J J A S O N D
Hours of Sunshine
Hours of Daylight
8
8 Hours of Sunshine (74% of Daylight Hours) in January
8
8 Hours of Sunshine (69% of Daylight Hours) in February
8
8 Hours of Sunshine (63% of Daylight Hours) in March
8
8 Hours of Sunshine (62% of Daylight Hours) in April
7
7 Hours of Sunshine (52% of Daylight Hours) in May
5
5 Hours of Sunshine (39% of Daylight Hours) in June
5
5 Hours of Sunshine (38% of Daylight Hours) in July
5
5 Hours of Sunshine (36% of Daylight Hours) in August
5
5 Hours of Sunshine (42% of Daylight Hours) in September
8
8 Hours of Sunshine (65% of Daylight Hours) in October
8
8 Hours of Sunshine (69% of Daylight Hours) in November
8
8 Hours of Sunshine (75% of Daylight Hours) in December
J F M A M J J A S O N D
11
11 Hours of Daylight in January
12
12 Hours of Daylight in February
12
12 Hours of Daylight in March
13
13 Hours of Daylight in April
13
13 Hours of Daylight in May
13
13 Hours of Daylight in June
13
13 Hours of Daylight in July
13
13 Hours of Daylight in August
12
12 Hours of Daylight in September
12
12 Hours of Daylight in October
11
11 Hours of Daylight in November
11
11 Hours of Daylight in December
J F M A M J J A S O N D
Days with some Rain
Monthly Rainfall (mm)
2
2 Days with some Rain in January
3
3 Days with some Rain in February
5
5 Days with some Rain in March
9
9 Days with some Rain in April
17
17 Days with some Rain in May
19
19 Days with some Rain in June
20
20 Days with some Rain in July
22
22 Days with some Rain in August
19
19 Days with some Rain in September
9
9 Days with some Rain in October
2
2 Days with some Rain in November
1
1 Day with some Rain in December
J F M A M J J A S O N D
7
7 mm (0.3 inches) Monthly Rainfall in January
12
12 mm (0.5 inches) Monthly Rainfall in February
31
31 mm (1.2 inches) Monthly Rainfall in March
90
90 mm (3.5 inches) Monthly Rainfall in April
236
236 mm (9.3 inches) Monthly Rainfall in May
271
271 mm (10.7 inches) Monthly Rainfall in June
244
244 mm (9.6 inches) Monthly Rainfall in July
332
332 mm (13.1 inches) Monthly Rainfall in August
278
278 mm (10.9 inches) Monthly Rainfall in September
81
81 mm (3.2 inches) Monthly Rainfall in October
12
12 mm (0.5 inches) Monthly Rainfall in November
4
4 mm (0.2 inches) Monthly Rainfall in December
J F M A M J J A S O N D
Heat & Humidity / Chance of Frost
UV Index (Maximum)
M
Moderate Heat & Humidity in January
H
High Heat & Humidity in February
VH
Very High Heat & Humidity in March
E
Extreme Heat & Humidity in April
E
Extreme Heat & Humidity in May
VH
Very High Heat & Humidity in June
VH
Very High Heat & Humidity in July
VH
Very High Heat & Humidity in August
VH
Very High Heat & Humidity in September
VH
Very High Heat & Humidity in October
H
High Heat & Humidity in November
M
Moderate Heat & Humidity in December
J F M A M J J A S O N D
9
UV 9 (Very High) in January
11
UV 11 (Extreme) in February
11
UV 11+ (Extreme) in March
11
UV 11+ (Extreme) in April
11
UV 11+ (Extreme) in May
11
UV 11+ (Extreme) in June
11
UV 11+ (Extreme) in July
11
UV 11+ (Extreme) in August
11
UV 11+ (Extreme) in September
11
UV 11 (Extreme) in October
9
UV 9 (Very High) in November
8
UV 8 (Very High) in December
J F M A M J J A S O N D
Sea Temperature (°C)
Vientiane Climate Guide (Historical Weather Averages), Laos
Elev: 200 m   Long: 102°36'E   Lat: 17°57'N
Hoseasons
Bounneua · Houeisay · Luang Namtha · Luang Prabang · Oudomxay · Pakse · Savannakhut · Sayaboury · Xieng Khouang 
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