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Weather extremes

How extreme does San Luis Río Colorado's weather get?

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

Based on 33 years of daily weather observations (1993–present), from the Yuma Quartermaster Depot station 33 km away. Updated through May 2026 — 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 Río Colorado has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
125°F Jul 28, 1995

That is about 16°F hotter than a normal July afternoon in San Luis Río Colorado (typical high near 109°F).

The three most extreme on record

1 125°F Jul 28, 1995
2 123°F Jun 20, 2016
3 122°F Jun 21, 2017
❄️ Coldest night
18°F Dec 27, 2000

About 26°F colder than a normal December night in San Luis Río Colorado (typical low near 44°F).

The three most extreme on record

1 18°F Dec 27, 2000
2 21°F Dec 28, 2000
3 22°F Dec 29, 2000
🌧️ Most rain in one day
1.86 in Aug 26, 2025

More rain in a single day than San Luis Río Colorado usually gets in the whole month of August (typical August total about 0.3 in).

The three most extreme on record

1 1.86 in Aug 26, 2025recent
2 1.67 in Jan 21, 2010
3 1.50 in Oct 1, 2018

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°150° all-time high 125°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

San Luis Río Colorado's record heat sits well above even a hot day for the season — July's 125°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 Río Colorado's warmest days reach the high 100s°F and its coldest nights drop to the mid-40s°F. But across the record it has gone as high as 125°F and as low as 18°F. A single day has delivered over 2 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 Presa Morelos, about 29 km from the city centre.

How we build these numbers →