Rio do Sul climate — normals and trends

Q: What is the climate of Rio do Sul?

Rio do Sul has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 18.0 °C and it receives 1,458 mm of precipitation per year.

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

The hottest day measured in Rio do Sul between 1940 and 2025 was 7 February 2014, reaching 38.3 °C.

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

The coldest day measured in Rio do Sul between 1940 and 2025 was 18 July 1975, at -4.0 °C.

Q: Does it snow in Rio do Sul?

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

Q: Has the climate of Rio do Sul warmed?

Yes: Rio do Sul warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

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

The wettest day measured in Rio do Sul between 1940 and 2025 was 26 April 2012, with 97 mm of rain in 24 hours.

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

The windiest day measured in Rio do Sul between 1940 and 2025 was 4 September 1981, with winds reaching 36.7 km/h.

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

The warmest month in Rio do Sul is January (22.3 °C on average); the coldest is July (13.1 °C).

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

Rio do Sul receives on average 1,458 mm of precipitation per year, spread over about 166 rainy days.

Q: Is it sunny in Rio do Sul?

Rio do Sul gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Rio do Sul (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 18.0 °C and it receives 1,458 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 (22.3 °C on average) and the coldest is July (13.1 °C). Rainfall peaks in January.

Rio do Sul averages 1 frost days, 22 hot days (≥ 30 °C) and 166 rainy days per year.

Rio do Sul has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.3 °C (on 7 February 2014) and the coldest -4.0 °C (on 18 July 1975).

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

Rio do SulSanta Catarina

coords: -27.21°, -49.64°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthJanuaryDriest monthApril

Mean daily temperature

18.0°C

Average daily high

23.1°C

Average daily low

14.2°C

Annual rainfall

1,458mm

Sunshine / day

8.0h

Mean relative humidity

83%

Average peak wind

10.3km/h

Seasonal range

9.2°C

Frost days (< 0 °C)

1 d/yr

Hot days (≥ 30 °C)

22 d/yr

Rainy days (≥ 1 mm)

166 d/yr

Annual snowfall

0.0 cm

Average feels-like high

24.8 °C

Average feels-like low

14.7 °C

Average peak gust

26.8 km/h

Tropical nights (≥ 20 °C)

28 d/yr

Solar radiation

14.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.9 °C

since 1940

+0.1 °C per decade · r² = 0.27 · 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

38.3 °C

7 February 2014

Coldest day

-4.0 °C

18 July 1975

Wettest day

97 mm

26 April 2012

Windiest day

36.7 km/h

4 September 1981

Strongest gust

91.4 km/h

2 July 1983

Hottest feels-like

42.0 °C

4 February 2010

Coldest feels-like

-7.9 °C

18 July 1975

Sunniest day

13.7 h

6 December 1945

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.9 °C27 December 2025	-2.2 °C25 June 2025	18.2 °C	1,450 mm	44	1
2024	35.4 °C8 January 2024	0.0 °C13 August 2024	19.0 °C	1,721 mm	50	0
2023	34.6 °C12 November 2023	2.7 °C19 June 2023	18.7 °C	1,662 mm	37	0
2022	34.2 °C24 January 2022	-0.1 °C20 August 2022	17.8 °C	1,628 mm	40	1
2021	32.2 °C23 November 2021	-2.0 °C30 July 2021	17.9 °C	1,227 mm	16	2
2020	34.6 °C18 February 2020	1.0 °C22 August 2020	18.3 °C	1,127 mm	39	0
2019	36.2 °C30 January 2019	-2.2 °C7 July 2019	19.0 °C	1,287 mm	40	3
2018	34.2 °C14 December 2018	1.8 °C27 August 2018	18.5 °C	1,183 mm	25	0
2017	33.4 °C16 November 2017	-1.1 °C19 July 2017	19.0 °C	1,468 mm	37	1
2016	34.7 °C26 December 2016	-2.1 °C13 June 2016	18.1 °C	1,438 mm	33	3
2015	35.1 °C12 January 2015	1.1 °C16 June 2015	19.1 °C	1,808 mm	36	0
2014	38.3 °C7 February 2014	1.5 °C3 June 2014	19.0 °C	1,495 mm	44	0
2013	36.6 °C26 December 2013	-2.4 °C24 July 2013	17.8 °C	1,520 mm	28	1
2012	34.4 °C25 December 2012	0.5 °C8 June 2012	18.6 °C	1,344 mm	37	0
2011	33.9 °C22 December 2011	-2.4 °C5 August 2011	17.7 °C	1,917 mm	16	4
2010	36.1 °C4 February 2010	-1.0 °C15 July 2010	18.1 °C	1,705 mm	21	1
2009	35.0 °C19 November 2009	-1.5 °C25 July 2009	17.9 °C	1,493 mm	29	1
2008	32.2 °C3 September 2008	-1.8 °C17 June 2008	17.6 °C	1,535 mm	10	3
2007	33.4 °C28 March 2007	-1.8 °C24 July 2007	18.3 °C	1,319 mm	40	3
2006	33.3 °C17 December 2006	-0.4 °C22 August 2006	18.5 °C	961 mm	34	1
2005	34.3 °C11 March 2005	0.6 °C20 July 2005	18.4 °C	1,557 mm	30	0
2004	32.2 °C2 March 2004	-1.5 °C14 June 2004	17.9 °C	1,498 mm	18	3
2003	34.6 °C1 March 2003	-1.5 °C12 July 2003	18.2 °C	1,128 mm	30	1
2002	34.4 °C10 March 2002	-0.4 °C3 September 2002	18.9 °C	1,528 mm	45	1
2001	33.8 °C10 February 2001	-0.2 °C22 June 2001	18.8 °C	1,496 mm	36	1
2000	33.5 °C22 January 2000	-3.4 °C21 July 2000	17.7 °C	1,501 mm	24	7
1999	33.4 °C19 December 1999	-0.2 °C16 August 1999	17.6 °C	1,331 mm	25	1
1998	34.0 °C28 January 1998	1.8 °C11 July 1998	17.9 °C	2,128 mm	29	0
1997	33.8 °C22 December 1997	2.2 °C1 July 1997	18.4 °C	1,627 mm	25	0
1996	32.7 °C12 January 1996	0.2 °C22 July 1996	17.7 °C	1,810 mm	32	0
1995	35.3 °C18 December 1995	0.1 °C26 June 1995	18.1 °C	1,620 mm	23	0
1994	34.5 °C12 December 1994	-1.9 °C27 June 1994	18.4 °C	1,611 mm	30	4
1993	34.6 °C8 January 1993	-0.8 °C2 August 1993	18.0 °C	1,590 mm	23	4
1992	32.4 °C21 December 1992	-1.4 °C20 July 1992	18.0 °C	1,649 mm	25	4
1991	34.6 °C16 October 1991	-3.8 °C3 August 1991	18.1 °C	1,300 mm	27	5
1990	33.9 °C23 December 1990	-2.5 °C29 July 1990	17.8 °C	1,722 mm	25	6
1989	32.5 °C5 March 1989	-0.6 °C6 July 1989	17.4 °C	1,327 mm	12	1
1988	33.8 °C18 January 1988	-1.8 °C6 June 1988	17.6 °C	1,196 mm	37	7
1987	34.0 °C5 March 1987	-2.1 °C17 June 1987	17.8 °C	1,709 mm	31	3
1986	34.5 °C17 January 1986	2.6 °C6 September 1986	18.7 °C	1,283 mm	36	0
1985	34.3 °C16 November 1985	0.2 °C11 July 1985	18.4 °C	1,125 mm	38	0
1984	34.6 °C14 January 1984	-1.5 °C28 June 1984	18.1 °C	1,646 mm	43	2
1983	32.4 °C12 February 1983	0.2 °C16 June 1983	18.0 °C	2,461 mm	15	0
1982	31.8 °C14 February 1982	0.9 °C30 July 1982	18.0 °C	1,377 mm	13	0
1981	31.7 °C3 January 1981	-0.9 °C20 June 1981	17.9 °C	1,228 mm	12	2
1980	33.2 °C17 December 1980	-1.1 °C4 June 1980	17.9 °C	1,561 mm	20	5
1979	33.1 °C7 February 1979	-0.4 °C18 July 1979	17.2 °C	1,438 mm	20	1
1978	35.3 °C8 January 1978	-1.6 °C5 June 1978	18.0 °C	971 mm	39	2
1977	33.5 °C28 February 1977	-0.1 °C26 June 1977	18.7 °C	1,554 mm	34	1
1976	33.9 °C13 January 1976	-2.1 °C10 July 1976	17.4 °C	1,634 mm	18	3
1975	35.8 °C13 February 1975	-4.0 °C18 July 1975	17.6 °C	1,643 mm	25	2
1974	32.6 °C6 January 1974	-0.9 °C14 June 1974	17.7 °C	1,398 mm	20	2
1973	34.7 °C10 February 1973	1.3 °C30 June 1973	18.0 °C	1,680 mm	26	0
1972	32.5 °C28 December 1972	-0.8 °C11 July 1972	18.0 °C	1,564 mm	20	3
1971	35.7 °C20 December 1971	-1.4 °C17 June 1971	17.8 °C	1,421 mm	38	3
1970	33.6 °C7 January 1970	0.1 °C25 June 1970	18.1 °C	1,279 mm	26	0
1969	32.5 °C7 February 1969	1.3 °C12 July 1969	17.6 °C	1,453 mm	17	0
1968	34.0 °C2 November 1968	-0.3 °C18 May 1968	17.1 °C	1,087 mm	21	1
1967	31.4 °C28 February 1967	-1.0 °C10 June 1967	17.9 °C	1,435 mm	9	1
1966	32.0 °C24 January 1966	-0.6 °C7 August 1966	17.3 °C	1,680 mm	8	1
1965	31.0 °C2 February 1965	-2.4 °C12 July 1965	17.5 °C	1,270 mm	9	1
1964	30.9 °C12 March 1964	-0.1 °C19 July 1964	17.0 °C	1,293 mm	9	1
1963	32.3 °C9 January 1963	-0.1 °C6 August 1963	17.9 °C	1,415 mm	18	1
1962	33.0 °C29 November 1962	-0.9 °C18 July 1962	16.6 °C	1,064 mm	5	1
1961	32.7 °C17 January 1961	-1.1 °C16 June 1961	18.4 °C	1,253 mm	17	2
1960	31.7 °C9 December 1960	-0.8 °C25 June 1960	17.2 °C	1,217 mm	2	1
1959	30.7 °C26 January 1959	0.3 °C11 June 1959	18.0 °C	1,211 mm	7	0
1958	33.0 °C16 February 1958	1.2 °C19 June 1958	17.9 °C	1,511 mm	18	0
1957	31.4 °C30 December 1957	-0.7 °C3 August 1957	17.5 °C	1,657 mm	6	1
1956	31.8 °C1 February 1956	-0.8 °C15 May 1956	17.0 °C	1,160 mm	9	2
1955	31.9 °C19 February 1955	-2.3 °C31 July 1955	17.2 °C	1,427 mm	12	4
1954	31.7 °C12 January 1954	2.0 °C6 July 1954	17.8 °C	1,643 mm	6	0
1953	33.0 °C14 January 1953	2.6 °C25 July 1953	18.2 °C	1,290 mm	16	0
1952	33.1 °C27 December 1952	1.8 °C20 June 1952	17.8 °C	961 mm	9	0
1951	30.9 °C25 September 1951	1.7 °C6 July 1951	17.3 °C	1,266 mm	2	0
1950	29.6 °C27 December 1950	-1.1 °C11 July 1950	17.3 °C	1,478 mm	0	2
1949	31.2 °C3 January 1949	3.4 °C16 August 1949	17.4 °C	1,682 mm	2	0
1948	30.5 °C6 January 1948	0.8 °C17 June 1948	17.6 °C	1,643 mm	4	0
1947	31.6 °C6 February 1947	0.7 °C8 July 1947	17.3 °C	1,489 mm	4	0
1946	29.5 °C28 February 1946	1.8 °C17 June 1946	18.0 °C	1,891 mm	0	0
1945	32.2 °C16 January 1945	0.6 °C21 June 1945	18.0 °C	1,643 mm	1	0
1944	30.9 °C20 December 1944	1.4 °C28 June 1944	18.3 °C	1,183 mm	2	0
1943	33.9 °C3 January 1943	1.7 °C29 August 1943	17.9 °C	800 mm	35	0
1942	32.4 °C26 November 1942	-1.5 °C19 June 1942	17.5 °C	1,084 mm	13	2
1941	31.8 °C6 January 1941	0.6 °C26 June 1941	18.0 °C	1,639 mm	8	0
1940	30.4 °C9 April 1940	2.4 °C27 August 1940	18.2 °C	1,709 mm	2	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

23.3 °C

+0.2 °C

Hot days (≥ 30 °C)

44 d/yr

+22

Frost days (< 0 °C)

1 d/yr

Annual rainfall

1450 mm

-8 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	27.8 °C	+0.3 °C	141 mm	-29 mm
Feb	29.9 °C	+2.6 °C	161 mm	+17 mm
Mar	28.2 °C	+2.1 °C	68 mm	-46 mm
Apr	23.6 °C	+0.1 °C	75 mm	-10 mm
May	21.5 °C	+1.1 °C	84 mm	-8 mm
Jun	17.1 °C	-1.4 °C	165 mm	+67 mm
Jul	17.9 °C	-0.4 °C	37 mm	-57 mm
Aug	18.7 °C	-1.2 °C	96 mm	-7 mm
Sep	20.8 °C	-0.3 °C	164 mm	+21 mm
Oct	21.5 °C	-1.2 °C	164 mm	+7 mm
Nov	24.5 °C	-0.3 °C	167 mm	+47 mm
Dec	29.1 °C	+2.6 °C	129 mm	-9 mm

The year's extremes

Hottest day

34.9 °C

27 Dec 2025

Coldest day

-2.2 °C

25 Jun 2025

Wettest day

58.9 mm

17 Feb 2025

Windiest day

30.1 km/h

28 Jul 2025

Strongest gust

78.8 km/h

10 Dec 2025

Hottest feels-like

39.7 °C

27 Dec 2025

Coldest feels-like

-5.4 °C

25 Jun 2025

Sunniest day

13.6 h

17 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 Rio do Sul?

Rio do Sul has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 18.0 °C and it receives 1,458 mm of precipitation per year.

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

The hottest day measured in Rio do Sul between 1940 and 2025 was 7 February 2014, reaching 38.3 °C.

What is the coldest day in Rio do Sul?

The coldest day measured in Rio do Sul between 1940 and 2025 was 18 July 1975, at -4.0 °C.

Does it snow in Rio do Sul?

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

Has the climate of Rio do Sul warmed?

Yes: Rio do Sul warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Rio do Sul?

The wettest day measured in Rio do Sul between 1940 and 2025 was 26 April 2012, with 97 mm of rain in 24 hours.

What was the windiest day in Rio do Sul?

The windiest day measured in Rio do Sul between 1940 and 2025 was 4 September 1981, with winds reaching 36.7 km/h.

What is the warmest month in Rio do Sul?

The warmest month in Rio do Sul is January (22.3 °C on average); the coldest is July (13.1 °C).

How much does it rain in Rio do Sul?

Rio do Sul receives on average 1,458 mm of precipitation per year, spread over about 166 rainy days.

Is it sunny in Rio do Sul?

Rio do Sul gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Are there tropical nights in Rio do Sul?

Yes: Rio do Sul has on average 28 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

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

In Rio do Sul, between 1940 and 2025, the highest apparent temperature reached 42.0 °C on 4 February 2010, and the lowest was -7.9 °C on 18 July 1975.

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