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San Luis Potosí, San Luis Potosí climate
BSk Cold semi-arid
San Luis Potosí has a mildly seasonal mild-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is May with an average daily high near 31°C, while the coldest is January averaging around 4°C at night. Precipitation totals about 386 mm a year and is strongly seasonal — September alone averages 75 mm while December barely receives 7 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)San Luis Potosí climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 25 | 27 | 30 | 31 | 29 | 28 | 28 | 26 | 25 | 24 | 23 |
| Avg temp (°C) | 13 | 15 | 17 | 20 | 21 | 21 | 20 | 20 | 19 | 17 | 15 | 14 |
| Avg low (°C) | 4 | 5 | 7 | 10 | 12 | 13 | 12 | 12 | 12 | 9 | 6 | 4 |
| Precipitation (mm) | 13 | 12 | 9 | 11 | 44 | 59 | 61 | 48 | 75 | 33 | 15 | 7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 25 | 27 | 30 | 31 | 29 |
| Avg temp (°C) | 13 | 15 | 17 | 20 | 21 | 21 |
| Avg low (°C) | 4 | 5 | 7 | 10 | 12 | 13 |
| Precipitation (mm) | 13 | 12 | 9 | 11 | 44 | 59 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 26 | 25 | 24 | 23 |
| Avg temp (°C) | 20 | 20 | 19 | 17 | 15 | 14 |
| Avg low (°C) | 12 | 12 | 12 | 9 | 6 | 4 |
| Precipitation (mm) | 61 | 48 | 75 | 33 | 15 | 7 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 43 | 43 | 45 | 45 | 53 | 55 | 53 | 59 | 48 | 43 | 47 |
| Relative humidity (%) | 58 | 53 | 46 | 41 | 48 | 63 | 70 | 72 | 75 | 71 | 67 | 62 |
| Wind speed (km/h) | 10.2 | 10.9 | 11.6 | 11.6 | 10.5 | 11.9 | 12.2 | 12.3 | 11.6 | 10.1 | 9.5 | 9.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 43 | 43 | 45 | 45 | 53 |
| Relative humidity (%) | 58 | 53 | 46 | 41 | 48 | 63 |
| Wind speed (km/h) | 10.2 | 10.9 | 11.6 | 11.6 | 10.5 | 11.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 53 | 59 | 48 | 43 | 47 |
| Relative humidity (%) | 70 | 72 | 75 | 71 | 67 | 62 |
| Wind speed (km/h) | 12.2 | 12.3 | 11.6 | 10.1 | 9.5 | 9.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at San Luis Potosi (smn), inside the city.
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.