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Lai Châu, Vietnam climate
Cwa Monsoon-influenced humid subtropical
Lai Châu has a mildly seasonal tropical climate (Monsoon-influenced humid subtropical, Köppen Cwa). The hottest month is June with an average daily high near 33°C, while the coldest is January averaging around 14°C at night. Precipitation totals about 1592 mm a year and is strongly seasonal — August alone averages 326 mm while February barely receives 26 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)Lai Châu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 22 | 25 | 29 | 32 | 33 | 33 | 33 | 32 | 29 | 26 | 22 |
| Avg temp (°C) | 17 | 19 | 22 | 25 | 28 | 29 | 29 | 29 | 28 | 25 | 22 | 18 |
| Avg low (°C) | 14 | 16 | 18 | 22 | 24 | 26 | 26 | 25 | 24 | 22 | 18 | 15 |
| Precipitation (mm) | 34 | 26 | 64 | 117 | 178 | 192 | 273 | 326 | 197 | 101 | 53 | 32 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 22 | 25 | 29 | 32 | 33 |
| Avg temp (°C) | 17 | 19 | 22 | 25 | 28 | 29 |
| Avg low (°C) | 14 | 16 | 18 | 22 | 24 | 26 |
| Precipitation (mm) | 34 | 26 | 64 | 117 | 178 | 192 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 33 | 32 | 29 | 26 | 22 |
| Avg temp (°C) | 29 | 29 | 28 | 25 | 22 | 18 |
| Avg low (°C) | 26 | 25 | 24 | 22 | 18 | 15 |
| Precipitation (mm) | 273 | 326 | 197 | 101 | 53 | 32 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 57 | 58 | 65 | 76 | 89 | 89 | 84 | 73 | 69 | 57 | 61 |
| Relative humidity (%) | 81 | 76 | 73 | 73 | 75 | 80 | 82 | 82 | 81 | 82 | 81 | 81 |
| Wind speed (mph) | 1.7 | 1.9 | 2.0 | 2.0 | 1.8 | 1.7 | 1.6 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 57 | 58 | 65 | 76 | 89 |
| Relative humidity (%) | 81 | 76 | 73 | 73 | 75 | 80 |
| Wind speed (mph) | 1.7 | 1.9 | 2.0 | 2.0 | 1.8 | 1.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 89 | 84 | 73 | 69 | 57 | 61 |
| Relative humidity (%) | 82 | 82 | 81 | 82 | 81 | 81 |
| Wind speed (mph) | 1.6 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Lao Cai, a weather station, about 54 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.