Weather in San Luis Potosí in August

A good month. August works. It is not the peak, but nothing about it fights you. You should expect rain on 15 days of the month, which is more days wet than dry.

August ranks 10 of 12 — near the bottom of San Luis Potosí's year. December is the month that works, and the swing between the two is 32 points, which is a different holiday rather than a slightly better one. Worth keeping in perspective: August is the weakest month of San Luis Potosí's year and it is still a perfectly good one. The downside here is small.

Rain on 15 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 32.8 °C and the coldest night fell to 9.7 °C, and the wettest single day dropped 29 mm — roughly 33% of the month's rain in one day.

August is moderately variable: 44 mm in the driest year against 233 mm in the wettest, around an average of 89 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 12 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 71%.

How August sits in the year

Temperatures hold steady either side: 27 °C in July, 27.1 here, 25.6 in September. Nothing about the timing within the month matters much.

Daylight in August

August is at or near the longest days of San Luis Potosí's year: 12.9 hours of daylight, losing 0.5 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

Despite being inland, the year stays fairly even: 24.5 °C between the year's warmest afternoons and coldest nights. At 1886 m, altitude is doing as much work here as latitude: thinner air means fierce sun by day and heat that leaves the moment it sets.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in San Luis Potosí versus nearby

If San Luis Potosí is one option among several, the nearby comparison is worth making. Santiago de Querétaro is close enough to be a coin toss — within a degree on temperature, 7 days more rain. Morelia is close enough to be a coin toss — 2.7 °C cooler, 13 days more rain.

So: August is a compromise. December is 27 points better and is what San Luis Potosí is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in San Luis Potosí

See all twelve months in San Luis Potosí, or where else to go in August.