San Luis Potosí Temperature by Month

San Luis Potosí in San Luis Potosí, Mexico sees moderate seasonal temperature shifts, with daytime highs between 21°C (70°F) in January and 30°C (86°F) in May, averaging 25°C (77°F) annually. Explore the full monthly breakdown below.

In San Luis Potosí, seasonal changes bring about a moderate variation in temperatures. Nighttime lows range from 14°C (57°F) in May to 6°C (43°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in San Luis Potosí by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. May, the city's warmest month, gets 283 hours of sunshine.

The chart below shows the average temperature throughout the year:

San Luis Potosí's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In San Luis Potosí, January is the coolest month, with average highs of 21°C (70°F) and humidity around 57%, considered moderate. In May, the warmest month, temperatures average 30°C (86°F) with 52% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on San Luis Potosí's weather, including monthly rainfall, sunshine hours, and humidity, visit our San Luis Potosí climate page.