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Weather extremes

How extreme does Treinta y Tres's weather get?

The hottest, coldest, wettest and snowiest days Treinta y Tres 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 Treinta Y Tres station 2 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 Treinta y Tres has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
105°F Dec 19, 1995

That is about 21°F hotter than a normal December afternoon in Treinta y Tres (typical high near 84°F).

The three most extreme on record

1 105°F Dec 19, 1995
2 105°F Dec 18, 1995
3 104°F Dec 22, 1995
❄️ Coldest night
21°F Jun 26, 2002

About 25°F colder than a normal June night in Treinta y Tres (typical low near 46°F).

The three most extreme on record

1 21°F Jun 26, 2002
2 25°F Jun 28, 2025
3 25°F Jul 3, 2025
🌧️ Most rain in one day
8.19 in Apr 18, 1998

The three most extreme on record

1 8.19 in Apr 18, 1998
2 7.17 in Dec 27, 1997
3 6.38 in Apr 18, 2016

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°30°50°70°90°110°130° all-time high 105°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Treinta y Tres's record heat sits well above even a hot day for the season — December's 105°F is about 21°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, Treinta y Tres's warmest days reach the high 80s°F and its coldest nights drop to the mid-40s°F. But across the record it has gone as high as 105°F and as low as 21°F. A single day has delivered over 8 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 — 1991–2020 normals computed from 27 years of daily observations at Cerro Largo, a weather station, about 101 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →