Rosário do Sul climate — normals and trends

Q: What is the climate of Rosário do Sul?

Rosário do Sul has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.1 °C and it receives 1,534 mm of precipitation per year.

Q: What is the hottest day ever recorded in Rosário do Sul?

The hottest day measured in Rosário do Sul between 1940 and 2025 was 15 November 1985, reaching 41.5 °C.

Q: What is the coldest day in Rosário do Sul?

The coldest day measured in Rosário do Sul between 1940 and 2025 was 5 August 1995, at -3.6 °C.

Q: Does it snow in Rosário do Sul?

Almost never: Rosário do Sul sees virtually no snow, with about 1 frost days per year.

Q: Has the climate of Rosário do Sul warmed?

Yes: Rosário do Sul warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Rosário do Sul?

The wettest day measured in Rosário do Sul between 1940 and 2025 was 23 December 2002, with 159 mm of rain in 24 hours.

Q: What was the windiest day in Rosário do Sul?

The windiest day measured in Rosário do Sul between 1940 and 2025 was 5 June 1992, with winds reaching 50.4 km/h.

Q: What is the warmest month in Rosário do Sul?

The warmest month in Rosário do Sul is January (25.0 °C on average); the coldest is July (13.2 °C).

Q: How much does it rain in Rosário do Sul?

Rosário do Sul receives on average 1,534 mm of precipitation per year, spread over about 114 rainy days.

Q: Is it sunny in Rosário do Sul?

Rosário do Sul gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

Rosário do Sul (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 19.1 °C and it receives 1,534 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 (25.0 °C on average) and the coldest is July (13.2 °C). Rainfall peaks in September.

Rosário do Sul averages 1 frost days, 66 hot days (≥ 30 °C) and 114 rainy days per year.

Rosário do Sul has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.

The hottest day of the period reached 41.5 °C (on 15 November 1985) and the coldest -3.6 °C (on 5 August 1995).

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

Rosário do SulRio Grande do Sul

coords: -30.26°, -54.91°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthSeptemberDriest monthDecember

Mean daily temperature

19.1°C

Average daily high

24.3°C

Average daily low

14.4°C

Annual rainfall

1,534mm

Sunshine / day

9.0h

Mean relative humidity

75%

Average peak wind

18.8km/h

Seasonal range

11.8°C

Frost days (< 0 °C)

1 d/yr

Hot days (≥ 30 °C)

66 d/yr

Rainy days (≥ 1 mm)

114 d/yr

Annual snowfall

0.0 cm

Average feels-like high

25.0 °C

Average feels-like low

13.6 °C

Average peak gust

34.6 km/h

Tropical nights (≥ 20 °C)

58 d/yr

Solar radiation

16.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.7 °C

since 1940

+0.1 °C per decade · r² = 0.15 · p = < 0.001

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

41.5 °C

15 November 1985

Coldest day

-3.6 °C

5 August 1995

Wettest day

159 mm

23 December 2002

Windiest day

50.4 km/h

5 June 1992

Strongest gust

108.4 km/h

17 October 1982

Hottest feels-like

45.7 °C

27 December 2013

Coldest feels-like

-7.6 °C

5 August 1995

Snowiest day

0.1 cm

8 July 1960

Sunniest day

13.7 h

4 January 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.8 °C4 February 2025	-2.0 °C1 July 2025	19.0 °C	1,939 mm	97	2
2024	36.6 °C12 February 2024	-1.5 °C9 July 2024	19.5 °C	1,785 mm	64	1
2023	37.4 °C12 February 2023	1.3 °C13 June 2023	19.8 °C	1,687 mm	88	0
2022	39.2 °C13 January 2022	0.6 °C31 May 2022	18.9 °C	1,012 mm	90	0
2021	36.8 °C11 January 2021	0.0 °C20 July 2021	19.0 °C	1,054 mm	79	0
2020	38.4 °C13 March 2020	-1.2 °C21 August 2020	19.5 °C	1,146 mm	93	2
2019	37.6 °C27 December 2019	-0.1 °C7 July 2019	19.9 °C	1,595 mm	82	1
2018	36.4 °C5 January 2018	1.2 °C26 August 2018	19.4 °C	1,525 mm	81	0
2017	39.0 °C16 December 2017	0.1 °C19 July 2017	20.1 °C	1,665 mm	83	0
2016	37.2 °C24 January 2016	0.6 °C12 June 2016	19.0 °C	1,420 mm	82	0
2015	34.2 °C6 January 2015	0.2 °C12 September 2015	19.6 °C	1,944 mm	66	0
2014	40.1 °C7 February 2014	0.4 °C20 June 2014	19.7 °C	1,992 mm	78	0
2013	41.3 °C26 December 2013	0.7 °C25 July 2013	18.9 °C	1,346 mm	67	0
2012	38.4 °C25 December 2012	-1.5 °C8 June 2012	20.0 °C	1,357 mm	98	4
2011	39.3 °C20 December 2011	-1.5 °C5 July 2011	19.6 °C	1,496 mm	104	4
2010	38.1 °C10 December 2010	0.4 °C4 August 2010	19.3 °C	1,405 mm	92	0
2009	36.8 °C10 February 2009	-0.3 °C30 July 2009	19.0 °C	1,429 mm	78	2
2008	38.0 °C21 December 2008	-0.1 °C17 June 2008	19.3 °C	1,386 mm	87	1
2007	36.4 °C22 December 2007	-2.4 °C12 July 2007	19.1 °C	1,797 mm	90	2
2006	39.5 °C16 March 2006	0.3 °C5 September 2006	20.0 °C	1,404 mm	112	0
2005	37.4 °C22 November 2005	2.0 °C20 July 2005	19.7 °C	1,375 mm	101	0
2004	36.8 °C15 December 2004	-0.4 °C11 July 2004	19.3 °C	1,121 mm	88	1
2003	37.3 °C31 January 2003	-0.6 °C12 July 2003	18.9 °C	1,642 mm	63	1
2002	36.9 °C20 January 2002	0.6 °C2 September 2002	19.4 °C	2,261 mm	71	0
2001	35.2 °C5 March 2001	1.5 °C28 July 2001	19.7 °C	1,843 mm	69	0
2000	37.7 °C8 January 2000	-1.7 °C14 July 2000	18.8 °C	1,927 mm	72	2
1999	39.8 °C27 December 1999	1.8 °C6 June 1999	19.1 °C	1,419 mm	94	0
1998	35.6 °C21 January 1998	1.3 °C25 June 1998	18.6 °C	2,570 mm	48	0
1997	37.7 °C7 January 1997	-2.2 °C28 June 1997	19.5 °C	1,926 mm	75	1
1996	37.7 °C4 January 1996	-3.2 °C30 June 1996	18.8 °C	1,606 mm	57	2
1995	40.0 °C18 December 1995	-3.6 °C5 August 1995	19.2 °C	1,663 mm	91	1
1994	38.5 °C12 December 1994	-0.4 °C11 July 1994	19.4 °C	1,769 mm	76	1
1993	35.6 °C24 January 1993	-1.9 °C15 July 1993	18.7 °C	1,640 mm	60	3
1992	34.7 °C29 December 1992	-0.1 °C2 August 1992	18.5 °C	1,640 mm	63	1
1991	37.3 °C23 November 1991	-2.2 °C14 July 1991	19.3 °C	1,533 mm	76	5
1990	38.4 °C7 January 1990	-0.9 °C28 July 1990	18.8 °C	1,604 mm	57	2
1989	37.5 °C28 February 1989	-0.6 °C3 July 1989	19.2 °C	1,089 mm	93	2
1988	39.4 °C12 January 1988	-1.1 °C25 July 1988	18.7 °C	1,281 mm	99	5
1987	40.1 °C1 December 1987	1.0 °C16 June 1987	19.1 °C	1,767 mm	86	0
1986	39.1 °C16 January 1986	1.0 °C14 May 1986	19.8 °C	1,948 mm	69	0
1985	41.5 °C15 November 1985	0.2 °C11 July 1985	19.8 °C	1,722 mm	87	0
1984	37.1 °C7 January 1984	-0.7 °C29 July 1984	19.0 °C	2,213 mm	70	1
1983	37.1 °C29 December 1983	0.2 °C6 June 1983	18.8 °C	1,923 mm	73	0
1982	38.6 °C27 January 1982	2.4 °C16 June 1982	19.7 °C	1,652 mm	70	0
1981	36.0 °C5 January 1981	-0.5 °C19 June 1981	19.7 °C	1,321 mm	87	1
1980	36.1 °C22 January 1980	-1.8 °C31 July 1980	19.5 °C	1,659 mm	86	2
1979	38.2 °C5 February 1979	0.3 °C15 June 1979	18.5 °C	1,336 mm	64	0
1978	36.4 °C15 March 1978	1.4 °C31 August 1978	19.0 °C	1,270 mm	60	0
1977	35.1 °C27 December 1977	2.2 °C2 September 1977	19.7 °C	2,095 mm	72	0
1976	36.7 °C29 February 1976	-0.8 °C10 July 1976	18.3 °C	1,256 mm	55	1
1975	36.8 °C26 January 1975	-2.9 °C18 July 1975	18.7 °C	1,368 mm	58	1
1974	37.4 °C4 January 1974	-0.6 °C8 August 1974	18.7 °C	1,391 mm	46	1
1973	36.1 °C12 January 1973	0.1 °C7 September 1973	18.7 °C	1,908 mm	57	0
1972	38.1 °C6 March 1972	0.4 °C4 August 1972	19.1 °C	2,105 mm	56	0
1971	38.0 °C29 December 1971	-1.9 °C17 June 1971	18.6 °C	1,209 mm	66	3
1970	37.3 °C1 March 1970	-0.4 °C2 July 1970	19.0 °C	1,490 mm	70	1
1969	35.4 °C4 February 1969	-1.1 °C19 June 1969	18.7 °C	1,552 mm	49	2
1968	38.3 °C9 February 1968	1.3 °C3 September 1968	19.0 °C	1,440 mm	85	0
1967	36.2 °C18 December 1967	-3.1 °C14 June 1967	18.9 °C	1,597 mm	50	1
1966	33.5 °C14 December 1966	0.6 °C24 July 1966	17.9 °C	1,699 mm	19	0
1965	38.6 °C1 February 1965	-0.4 °C7 July 1965	18.9 °C	1,378 mm	78	2
1964	36.8 °C26 January 1964	0.6 °C18 June 1964	18.0 °C	870 mm	50	0
1963	36.9 °C2 January 1963	0.1 °C6 August 1963	18.9 °C	1,676 mm	47	0
1962	36.5 °C28 November 1962	1.5 °C23 June 1962	18.1 °C	1,055 mm	66	0
1961	35.1 °C12 January 1961	-1.4 °C16 June 1961	19.1 °C	1,540 mm	59	2
1960	37.2 °C24 February 1960	0.7 °C9 July 1960	18.9 °C	1,227 mm	77	0
1959	33.9 °C25 January 1959	1.7 °C10 June 1959	18.5 °C	2,209 mm	36	0
1958	35.6 °C7 January 1958	1.7 °C24 May 1958	18.6 °C	1,553 mm	36	0
1957	33.8 °C25 December 1957	0.5 °C14 July 1957	18.5 °C	1,440 mm	30	0
1956	32.8 °C5 February 1956	1.5 °C11 June 1956	17.8 °C	1,354 mm	18	0
1955	34.4 °C7 January 1955	-1.0 °C8 July 1955	18.1 °C	1,293 mm	45	2
1954	33.2 °C9 January 1954	3.1 °C8 August 1954	18.6 °C	1,716 mm	31	0
1953	37.3 °C5 January 1953	1.0 °C20 July 1953	19.3 °C	1,633 mm	45	0
1952	37.2 °C27 December 1952	3.1 °C23 July 1952	18.8 °C	1,123 mm	43	0
1951	32.7 °C2 February 1951	2.2 °C6 July 1951	18.7 °C	1,359 mm	26	0
1950	35.3 °C29 January 1950	0.2 °C11 July 1950	18.8 °C	1,266 mm	50	0
1949	36.2 °C16 December 1949	-0.2 °C19 July 1949	18.7 °C	1,105 mm	54	1
1948	32.4 °C12 December 1948	1.2 °C8 August 1948	18.7 °C	1,579 mm	13	0
1947	33.2 °C29 November 1947	-0.7 °C10 July 1947	18.8 °C	1,309 mm	22	2
1946	36.0 °C23 January 1946	1.8 °C15 July 1946	18.7 °C	1,395 mm	39	0
1945	36.6 °C15 January 1945	-0.5 °C9 July 1945	19.6 °C	1,076 mm	52	1
1944	34.5 °C13 February 1944	1.4 °C27 June 1944	20.1 °C	1,530 mm	54	0
1943	39.5 °C17 January 1943	3.0 °C23 August 1943	20.3 °C	862 mm	77	0
1942	36.0 °C29 December 1942	-1.6 °C18 June 1942	19.0 °C	1,023 mm	63	1
1941	33.1 °C16 February 1941	0.2 °C19 July 1941	19.0 °C	1,534 mm	28	0
1940	34.6 °C22 March 1940	2.5 °C3 August 1940	19.1 °C	1,633 mm	65	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

24.6 °C

+0.3 °C

Hot days (≥ 30 °C)

97 d/yr

+31

Frost days (< 0 °C)

2 d/yr

Annual rainfall

1939 mm

+405 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	32.1 °C	+1.6 °C	58 mm	-84 mm
Feb	32.8 °C	+3.2 °C	138 mm	+9 mm
Mar	29.8 °C	+1.7 °C	82 mm	-33 mm
Apr	23.6 °C	-0.9 °C	105 mm	-27 mm
May	21.4 °C	+0.5 °C	269 mm	+148 mm
Jun	15.4 °C	-2.8 °C	207 mm	+79 mm
Jul	17.2 °C	-1.0 °C	67 mm	-51 mm
Aug	19.5 °C	-0.3 °C	215 mm	+100 mm
Sep	21.5 °C	+0.1 °C	290 mm	+136 mm
Oct	24.8 °C	+0.8 °C	128 mm	-23 mm
Nov	27.9 °C	+0.9 °C	61 mm	-54 mm
Dec	30.0 °C	+0.4 °C	320 mm	+206 mm

The year's extremes

Hottest day

38.8 °C

4 Feb 2025

Coldest day

-2.0 °C

1 Jul 2025

Wettest day

107.8 mm

9 Dec 2025

Windiest day

40.0 km/h

20 Aug 2025

Strongest gust

73.1 km/h

27 May 2025

Hottest feels-like

43.7 °C

3 Mar 2025

Coldest feels-like

-5.4 °C

1 Jul 2025

Sunniest day

13.7 h

2 Jan 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 Rosário do Sul?

Rosário do Sul has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.1 °C and it receives 1,534 mm of precipitation per year.

What is the hottest day ever recorded in Rosário do Sul?

The hottest day measured in Rosário do Sul between 1940 and 2025 was 15 November 1985, reaching 41.5 °C.

What is the coldest day in Rosário do Sul?

The coldest day measured in Rosário do Sul between 1940 and 2025 was 5 August 1995, at -3.6 °C.

Does it snow in Rosário do Sul?

Almost never: Rosário do Sul sees virtually no snow, with about 1 frost days per year.

Has the climate of Rosário do Sul warmed?

Yes: Rosário do Sul warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Rosário do Sul?

The wettest day measured in Rosário do Sul between 1940 and 2025 was 23 December 2002, with 159 mm of rain in 24 hours.

What was the windiest day in Rosário do Sul?

The windiest day measured in Rosário do Sul between 1940 and 2025 was 5 June 1992, with winds reaching 50.4 km/h.

What is the warmest month in Rosário do Sul?

The warmest month in Rosário do Sul is January (25.0 °C on average); the coldest is July (13.2 °C).

How much does it rain in Rosário do Sul?

Rosário do Sul receives on average 1,534 mm of precipitation per year, spread over about 114 rainy days.

Is it sunny in Rosário do Sul?

Rosário do Sul gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

What is the biggest single-day snowfall in Rosário do Sul?

The heaviest 24-hour snowfall measured in Rosário do Sul between 1940 and 2025 was 8 July 1960, with 0.1 cm.

Are there tropical nights in Rosário do Sul?

Yes: Rosário do Sul has on average 58 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Rosário do Sul?

In Rosário do Sul, between 1940 and 2025, the highest apparent temperature reached 45.7 °C on 27 December 2013, and the lowest was -7.6 °C on 5 August 1995.

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