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Attapeu, Laos climate
Aw Tropical savanna (dry winter)
Attapeu has a mildly seasonal tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is April with an average daily high near 35°C, while the coldest is December averaging around 17°C at night. Precipitation totals about 1686 mm a year and is strongly seasonal — July alone averages 336 mm while January barely receives 3 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Attapeu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 31 | 33 | 35 | 33 | 31 | 30 | 30 | 29 | 29 | 29 | 27 |
| Avg temp (°C) | 22 | 24 | 27 | 29 | 28 | 27 | 27 | 26 | 26 | 25 | 24 | 22 |
| Avg low (°C) | 16 | 18 | 21 | 23 | 24 | 23 | 23 | 23 | 22 | 21 | 19 | 17 |
| Precipitation (mm) | 3 | 6 | 28 | 62 | 191 | 255 | 336 | 333 | 287 | 132 | 43 | 10 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 31 | 33 | 35 | 33 | 31 |
| Avg temp (°C) | 22 | 24 | 27 | 29 | 28 | 27 |
| Avg low (°C) | 16 | 18 | 21 | 23 | 24 | 23 |
| Precipitation (mm) | 3 | 6 | 28 | 62 | 191 | 255 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 29 | 29 | 29 | 27 |
| Avg temp (°C) | 27 | 26 | 26 | 25 | 24 | 22 |
| Avg low (°C) | 23 | 23 | 22 | 21 | 19 | 17 |
| Precipitation (mm) | 336 | 333 | 287 | 132 | 43 | 10 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | 5 | 11 | 20 | 23 | 19 | 11 | 8 | 6 | 5 | 5 | 5 | 4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | 5 | 11 | 20 | 23 | 19 | 11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | 8 | 6 | 5 | 5 | 5 | 4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 36 | 35 | 48 | 67 | 81 | 87 | 89 | 91 | 88 | 69 | 51 | 46 |
| Relative humidity (%) | 73 | 66 | 62 | 62 | 72 | 78 | 80 | 83 | 85 | 84 | 81 | 78 |
| Wind speed (m/s) | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 36 | 35 | 48 | 67 | 81 | 87 |
| Relative humidity (%) | 73 | 66 | 62 | 62 | 72 | 78 |
| Wind speed (m/s) | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 89 | 91 | 88 | 69 | 51 | 46 |
| Relative humidity (%) | 80 | 83 | 85 | 84 | 81 | 78 |
| Wind speed (m/s) | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
Methodology & sources
Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.