Treinta y Tres climate — normals and trends

Q: What is the climate of Treinta y Tres?

Treinta y Tres has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 1,067 mm of precipitation per year.

Q: What is the hottest day ever recorded in Treinta y Tres?

The hottest day measured in Treinta y Tres between 1940 and 2025 was 14 January 2022, reaching 39.9 °C.

Q: What is the coldest day in Treinta y Tres?

The coldest day measured in Treinta y Tres between 1940 and 2025 was 14 June 1967, at -2.9 °C.

Q: Does it snow in Treinta y Tres?

Almost never: Treinta y Tres sees virtually no snow, with about 2 frost days per year.

Q: Has the climate of Treinta y Tres warmed?

Yes: Treinta y Tres warmed by +0.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Treinta y Tres?

The wettest day measured in Treinta y Tres between 1940 and 2025 was 12 November 1989, with 154 mm of rain in 24 hours.

Q: What was the windiest day in Treinta y Tres?

The windiest day measured in Treinta y Tres between 1940 and 2025 was 27 October 2016, with winds reaching 56.3 km/h.

Q: What is the warmest month in Treinta y Tres?

The warmest month in Treinta y Tres is January (23.2 °C on average); the coldest is July (11.2 °C).

Q: How much does it rain in Treinta y Tres?

Treinta y Tres receives on average 1,067 mm of precipitation per year, spread over about 99 rainy days.

Q: Is it sunny in Treinta y Tres?

Treinta y Tres gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Treinta y Tres (Uruguay) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.1 °C and it receives 1,067 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is January (23.2 °C on average) and the coldest is July (11.2 °C). Rainfall peaks in September.

Treinta y Tres averages 2 frost days, 33 hot days (≥ 30 °C) and 99 rainy days per year.

Treinta y Tres has warmed by +0.3 °C between 1940 and 2025, or +0.04 °C per decade. This trend is statistically significant.

The number of frost days there went from about 1 to 3 per year over the period.

The hottest day of the period reached 39.9 °C (on 14 January 2022) and the coldest -2.9 °C (on 14 June 1967).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

Treinta y TresTreinta y Tres Department

coords: -33.23°, -54.39°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthSeptemberDriest monthDecember

Mean daily temperature

17.1°C

Average daily high

22.3°C

Average daily low

12.4°C

Annual rainfall

1,067mm

Sunshine / day

8.8h

Mean relative humidity

77%

Average peak wind

18.8km/h

Seasonal range

12.0°C

Frost days (< 0 °C)

2 d/yr

Hot days (≥ 30 °C)

33 d/yr

Rainy days (≥ 1 mm)

99 d/yr

Annual snowfall

0.0 cm

Average feels-like high

22.2 °C

Average feels-like low

11.2 °C

Average peak gust

35.5 km/h

Tropical nights (≥ 20 °C)

24 d/yr

Solar radiation

16.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.3 °C

since 1940

0.0 °C per decade · r² = 0.06 · p = 0.028

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

39.9 °C

14 January 2022

Coldest day

-2.9 °C

14 June 1967

Wettest day

154 mm

12 November 1989

Windiest day

56.3 km/h

27 October 2016

Strongest gust

115.6 km/h

31 October 1970

Hottest feels-like

43.5 °C

30 December 1971

Coldest feels-like

-7.1 °C

14 June 1967

Sunniest day

14.2 h

11 December 2007

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.9 °C4 February 2025	-2.4 °C3 July 2025	17.0 °C	955 mm	53	5
2024	35.6 °C8 February 2024	-2.1 °C12 July 2024	17.0 °C	1,490 mm	23	9
2023	37.7 °C12 February 2023	-2.1 °C19 July 2023	17.6 °C	1,031 mm	56	4
2022	39.9 °C14 January 2022	-0.5 °C8 July 2022	16.8 °C	866 mm	52	2
2021	34.8 °C22 November 2021	1.5 °C11 July 2021	17.4 °C	1,119 mm	35	0
2020	34.8 °C24 November 2020	-0.5 °C15 July 2020	17.2 °C	840 mm	38	2
2019	35.5 °C29 January 2019	-0.8 °C4 August 2019	17.5 °C	1,353 mm	39	2
2018	35.1 °C4 January 2018	-0.3 °C25 June 2018	17.7 °C	1,008 mm	47	2
2017	35.3 °C16 December 2017	0.4 °C20 June 2017	18.3 °C	1,103 mm	46	0
2016	35.1 °C12 February 2016	0.5 °C13 June 2016	17.0 °C	1,134 mm	39	0
2015	33.8 °C12 December 2015	-1.5 °C19 June 2015	17.4 °C	1,066 mm	33	3
2014	36.3 °C1 January 2014	-2.1 °C27 July 2014	17.5 °C	1,375 mm	27	1
2013	38.6 °C26 December 2013	-0.1 °C15 August 2013	16.9 °C	1,073 mm	38	1
2012	37.5 °C10 January 2012	-2.9 °C9 June 2012	17.7 °C	1,259 mm	53	5
2011	36.8 °C16 January 2011	-0.3 °C2 July 2011	17.0 °C	854 mm	38	1
2010	34.9 °C26 December 2010	-1.3 °C17 July 2010	17.1 °C	1,183 mm	40	2
2009	36.1 °C10 February 2009	-0.8 °C31 July 2009	17.3 °C	972 mm	37	2
2008	34.8 °C8 December 2008	0.4 °C9 August 2008	17.3 °C	784 mm	34	0
2007	36.2 °C3 February 2007	-2.8 °C29 July 2007	17.0 °C	1,194 mm	46	4
2006	39.6 °C10 January 2006	1.3 °C1 August 2006	17.5 °C	1,112 mm	47	0
2005	36.6 °C24 January 2005	1.5 °C20 July 2005	17.5 °C	1,100 mm	51	0
2004	35.3 °C12 February 2004	-0.1 °C12 July 2004	17.3 °C	835 mm	45	1
2003	37.4 °C31 January 2003	-0.5 °C26 August 2003	16.6 °C	1,238 mm	35	1
2002	34.9 °C27 February 2002	-1.9 °C23 June 2002	17.1 °C	1,782 mm	29	5
2001	36.5 °C5 January 2001	-0.5 °C23 July 2001	17.8 °C	1,300 mm	40	2
2000	35.4 °C21 January 2000	-0.8 °C14 July 2000	17.0 °C	1,346 mm	40	3
1999	37.8 °C26 December 1999	0.0 °C5 July 1999	16.7 °C	912 mm	36	0
1998	34.0 °C21 January 1998	1.6 °C9 July 1998	16.5 °C	1,470 mm	13	0
1997	36.4 °C7 January 1997	-1.8 °C18 July 1997	17.5 °C	1,108 mm	37	3
1996	34.5 °C22 February 1996	-2.2 °C30 June 1996	16.9 °C	868 mm	35	5
1995	38.9 °C18 December 1995	0.0 °C21 July 1995	16.7 °C	1,034 mm	43	0
1994	35.7 °C12 December 1994	-2.1 °C28 June 1994	17.2 °C	1,093 mm	30	2
1993	35.1 °C24 January 1993	-0.9 °C12 July 1993	16.9 °C	1,179 mm	28	3
1992	34.7 °C20 February 1992	-1.6 °C3 August 1992	16.7 °C	1,232 mm	17	7
1991	37.7 °C27 February 1991	-1.1 °C14 July 1991	17.2 °C	1,300 mm	31	1
1990	37.4 °C26 January 1990	-1.4 °C29 August 1990	16.9 °C	1,508 mm	28	5
1989	37.8 °C18 February 1989	-1.3 °C4 July 1989	17.5 °C	866 mm	52	2
1988	34.8 °C25 December 1988	-2.2 °C12 July 1988	16.3 °C	826 mm	34	4
1987	36.1 °C28 January 1987	-1.8 °C15 June 1987	16.9 °C	1,281 mm	31	4
1986	36.8 °C25 January 1986	-0.3 °C28 July 1986	17.4 °C	1,352 mm	25	1
1985	35.4 °C10 January 1985	-0.9 °C11 July 1985	17.3 °C	969 mm	38	2
1984	33.4 °C7 January 1984	-2.7 °C29 July 1984	16.6 °C	1,302 mm	24	4
1983	35.6 °C10 January 1983	-1.6 °C11 June 1983	16.6 °C	1,268 mm	25	3
1982	35.5 °C28 December 1982	1.5 °C16 June 1982	17.2 °C	1,228 mm	29	0
1981	33.8 °C27 February 1981	0.8 °C21 June 1981	17.1 °C	1,008 mm	26	0
1980	35.8 °C22 January 1980	-1.2 °C31 July 1980	17.4 °C	1,237 mm	40	2
1979	34.3 °C25 January 1979	0.4 °C19 September 1979	16.7 °C	710 mm	34	0
1978	35.6 °C19 January 1978	-0.4 °C10 June 1978	16.8 °C	986 mm	18	1
1977	33.8 °C8 January 1977	1.1 °C1 August 1977	17.4 °C	1,609 mm	26	0
1976	36.6 °C1 January 1976	-1.1 °C11 July 1976	16.1 °C	1,222 mm	17	3
1975	37.2 °C26 January 1975	-1.0 °C18 July 1975	16.9 °C	851 mm	41	3
1974	35.2 °C19 January 1974	-0.4 °C23 July 1974	16.8 °C	1,131 mm	26	1
1973	35.9 °C5 January 1973	1.3 °C19 July 1973	17.0 °C	1,193 mm	27	0
1972	37.2 °C6 February 1972	-0.4 °C5 August 1972	17.4 °C	1,090 mm	44	2
1971	37.5 °C29 December 1971	-0.7 °C17 June 1971	16.8 °C	1,069 mm	27	2
1970	37.3 °C27 February 1970	-1.7 °C2 July 1970	17.2 °C	1,138 mm	37	1
1969	35.6 °C31 January 1969	0.8 °C19 June 1969	17.1 °C	829 mm	26	0
1968	36.3 °C11 December 1968	-0.1 °C6 July 1968	17.0 °C	1,185 mm	38	1
1967	36.0 °C31 January 1967	-2.9 °C14 June 1967	17.6 °C	1,358 mm	47	2
1966	33.5 °C5 February 1966	-1.3 °C3 September 1966	16.3 °C	919 mm	9	1
1965	37.2 °C17 February 1965	-0.2 °C16 July 1965	16.9 °C	834 mm	49	2
1964	35.6 °C25 January 1964	-0.7 °C20 July 1964	16.0 °C	802 mm	28	3
1963	34.9 °C26 January 1963	1.8 °C23 July 1963	16.8 °C	1,358 mm	26	0
1962	38.2 °C29 December 1962	-0.3 °C24 August 1962	16.5 °C	569 mm	36	1
1961	36.4 °C9 January 1961	-1.4 °C27 July 1961	17.0 °C	949 mm	24	2
1960	36.4 °C24 February 1960	-1.5 °C25 June 1960	17.0 °C	622 mm	48	2
1959	33.6 °C18 February 1959	0.8 °C18 August 1959	16.4 °C	1,286 mm	28	0
1958	33.1 °C7 January 1958	0.2 °C19 June 1958	16.8 °C	948 mm	6	0
1957	37.1 °C11 January 1957	-0.7 °C14 July 1957	16.7 °C	1,026 mm	24	2
1956	33.8 °C13 December 1956	-0.1 °C7 July 1956	17.1 °C	607 mm	38	1
1955	36.0 °C17 January 1955	-2.0 °C6 August 1955	16.3 °C	908 mm	28	4
1954	34.7 °C8 December 1954	0.5 °C19 July 1954	16.8 °C	916 mm	26	0
1953	36.8 °C11 January 1953	0.1 °C19 July 1953	17.4 °C	1,035 mm	32	0
1952	37.9 °C27 December 1952	0.5 °C19 August 1952	17.0 °C	907 mm	28	0
1951	33.3 °C2 February 1951	-1.3 °C4 August 1951	17.1 °C	1,275 mm	25	1
1950	37.4 °C29 January 1950	0.7 °C12 July 1950	16.9 °C	774 mm	40	0
1949	36.3 °C20 December 1949	-1.4 °C18 July 1949	16.8 °C	709 mm	40	3
1948	34.4 °C1 January 1948	-2.5 °C9 August 1948	17.2 °C	1,030 mm	23	2
1947	36.2 °C1 February 1947	0.5 °C11 July 1947	17.3 °C	815 mm	25	0
1946	38.1 °C13 February 1946	0.3 °C16 August 1946	17.0 °C	1,063 mm	32	0
1945	36.9 °C15 January 1945	-0.1 °C9 July 1945	17.5 °C	766 mm	35	1
1944	35.3 °C13 February 1944	1.4 °C8 September 1944	17.8 °C	1,074 mm	16	0
1943	38.3 °C1 January 1943	1.4 °C29 August 1943	18.2 °C	746 mm	43	0
1942	34.5 °C10 January 1942	-1.0 °C20 June 1942	16.8 °C	932 mm	29	2
1941	36.4 °C16 February 1941	-0.7 °C23 June 1941	16.9 °C	1,015 mm	25	1
1940	32.8 °C7 March 1940	1.0 °C3 August 1940	16.7 °C	1,088 mm	15	0

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

22.7 °C

+0.4 °C

Hot days (≥ 30 °C)

53 d/yr

+20

Frost days (< 0 °C)

5 d/yr

Annual rainfall

955 mm

-112 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.5 °C	-0.3 °C	52 mm	-38 mm
Feb	29.9 °C	+1.8 °C	142 mm	+48 mm
Mar	27.3 °C	+1.0 °C	42 mm	-38 mm
Apr	21.9 °C	-1.0 °C	143 mm	+53 mm
May	20.5 °C	+1.2 °C	99 mm	+13 mm
Jun	14.8 °C	-1.5 °C	69 mm	-19 mm
Jul	15.0 °C	-1.0 °C	101 mm	+15 mm
Aug	17.3 °C	0.0 °C	86 mm	-7 mm
Sep	19.6 °C	+0.7 °C	45 mm	-58 mm
Oct	23.4 °C	+1.9 °C	52 mm	-42 mm
Nov	25.1 °C	+0.6 °C	45 mm	-42 mm
Dec	29.8 °C	+2.4 °C	80 mm	+3 mm

The year's extremes

Hottest day

35.9 °C

4 Feb 2025

Coldest day

-2.4 °C

3 Jul 2025

Wettest day

72.5 mm

8 Apr 2025

Windiest day

42.1 km/h

23 Jun 2025

Strongest gust

76.7 km/h

23 Jun 2025

Hottest feels-like

42.7 °C

4 Mar 2025

Coldest feels-like

-5.8 °C

3 Jul 2025

Sunniest day

14.1 h

13 Dec 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Treinta y Tres?

Treinta y Tres has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 1,067 mm of precipitation per year.

What is the hottest day ever recorded in Treinta y Tres?

The hottest day measured in Treinta y Tres between 1940 and 2025 was 14 January 2022, reaching 39.9 °C.

What is the coldest day in Treinta y Tres?

The coldest day measured in Treinta y Tres between 1940 and 2025 was 14 June 1967, at -2.9 °C.

Does it snow in Treinta y Tres?

Almost never: Treinta y Tres sees virtually no snow, with about 2 frost days per year.

Has the climate of Treinta y Tres warmed?

Yes: Treinta y Tres warmed by +0.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Treinta y Tres?

The wettest day measured in Treinta y Tres between 1940 and 2025 was 12 November 1989, with 154 mm of rain in 24 hours.

What was the windiest day in Treinta y Tres?

The windiest day measured in Treinta y Tres between 1940 and 2025 was 27 October 2016, with winds reaching 56.3 km/h.

What is the warmest month in Treinta y Tres?

The warmest month in Treinta y Tres is January (23.2 °C on average); the coldest is July (11.2 °C).

How much does it rain in Treinta y Tres?

Treinta y Tres receives on average 1,067 mm of precipitation per year, spread over about 99 rainy days.

Is it sunny in Treinta y Tres?

Treinta y Tres gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Are there tropical nights in Treinta y Tres?

Yes: Treinta y Tres has on average 24 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Treinta y Tres?

In Treinta y Tres, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 30 December 1971, and the lowest was -7.1 °C on 14 June 1967.

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