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Weather extremes

How extreme does San Luis Potosí's weather get?

The hottest, coldest, wettest and snowiest days San Luis Potosí has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Ponciano Arriaga Intl / San Luis Potosi Intl station 12 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days San Luis Potosí has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F May 25, 2024

That is about 16°F hotter than a normal May afternoon in San Luis Potosí (typical high near 87°F).

The three most extreme on record

1 104°F May 25, 2024recent
2 103°F May 16, 2024
3 103°F May 27, 2024
❄️ Coldest night
16°F Dec 14, 1997

About 24°F colder than a normal December night in San Luis Potosí (typical low near 39°F).

The three most extreme on record

1 16°F Dec 14, 1997
2 18°F Dec 9, 2017
3 19°F Dec 10, 2017
🌧️ Most rain in one day
12.59 in Jun 8, 2004

More rain in a single day than San Luis Potosí usually gets in the whole month of June (typical June total about 3.1 in).

The three most extreme on record

1 12.59 in Jun 8, 2004
2 11.57 in May 6, 2004
3 11.52 in Nov 4, 2002

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-10°10°30°50°70°90°110°130° all-time high 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

San Luis Potosí's record heat sits well above even a hot day for the season — May's 104°F is about 16°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, San Luis Potosí's warmest days reach the high 80s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 104°F and as low as 16°F. A single day has delivered over 13 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
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.

How we build these numbers →