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Sainyabuli, Laos climate
Aw Tropical savanna (dry winter)
Sainyabuli 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 18°C at night. Precipitation totals about 1120 mm a year and is strongly seasonal — August alone averages 241 mm while December barely receives 2 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)Sainyabuli climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 33 | 35 | 34 | 33 | 32 | 31 | 32 | 32 | 31 | 29 |
| Avg temp (°C) | 23 | 25 | 28 | 30 | 29 | 29 | 28 | 28 | 28 | 28 | 26 | 23 |
| Avg low (°C) | 18 | 19 | 22 | 24 | 25 | 25 | 25 | 25 | 24 | 23 | 21 | 18 |
| Precipitation (mm) | 6 | 16 | 26 | 50 | 133 | 180 | 203 | 241 | 187 | 59 | 16 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 33 | 35 | 34 | 33 |
| Avg temp (°C) | 23 | 25 | 28 | 30 | 29 | 29 |
| Avg low (°C) | 18 | 19 | 22 | 24 | 25 | 25 |
| Precipitation (mm) | 6 | 16 | 26 | 50 | 133 | 180 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 31 | 32 | 32 | 31 | 29 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 26 | 23 |
| Avg low (°C) | 25 | 25 | 24 | 23 | 21 | 18 |
| Precipitation (mm) | 203 | 241 | 187 | 59 | 16 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 30 | 33 | 46 | 59 | 79 | 89 | 91 | 91 | 81 | 58 | 40 | 31 |
| Relative humidity (%) | 66 | 57 | 52 | 56 | 70 | 79 | 82 | 85 | 85 | 82 | 77 | 72 |
| Wind speed (mph) | 3.5 | 3.8 | 3.8 | 3.4 | 3.2 | 3.3 | 3.3 | 3.1 | 2.6 | 2.8 | 2.9 | 3.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 30 | 33 | 46 | 59 | 79 | 89 |
| Relative humidity (%) | 66 | 57 | 52 | 56 | 70 | 79 |
| Wind speed (mph) | 3.5 | 3.8 | 3.8 | 3.4 | 3.2 | 3.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 91 | 91 | 81 | 58 | 40 | 31 |
| Relative humidity (%) | 82 | 85 | 85 | 82 | 77 | 72 |
| Wind speed (mph) | 3.3 | 3.1 | 2.6 | 2.8 | 2.9 | 3.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Wattay Intl, a weather station, about 167 km from the city centre. The underlying daily records come from NOAA's global station network.
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.