Guareí climate — normals and trends

Q: What is the climate of Guareí?

Guareí has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.1 °C and it receives 1,491 mm of precipitation per year.

Q: What is the hottest day ever recorded in Guareí?

The hottest day measured in Guareí between 1940 and 2025 was 6 October 2020, reaching 39.0 °C.

Q: What is the coldest day in Guareí?

The coldest day measured in Guareí between 1940 and 2025 was 29 July 1990, at -0.3 °C.

Q: Does it snow in Guareí?

Almost never: Guareí sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Guareí warmed?

Yes: Guareí warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Guareí?

The wettest day measured in Guareí between 1940 and 2025 was 29 January 2022, with 119 mm of rain in 24 hours.

Q: What was the windiest day in Guareí?

The windiest day measured in Guareí between 1940 and 2025 was 28 November 1950, with winds reaching 38.8 km/h.

Q: What is the warmest month in Guareí?

The warmest month in Guareí is February (23.0 °C on average); the coldest is July (16.4 °C).

Q: How much does it rain in Guareí?

Guareí receives on average 1,491 mm of precipitation per year, spread over about 151 rainy days.

Q: Is it sunny in Guareí?

Guareí gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Guareí (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.1 °C and it receives 1,491 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 February (23.0 °C on average) and the coldest is July (16.4 °C). Rainfall peaks in January.

Guareí averages 0 frost days, 47 hot days (≥ 30 °C) and 151 rainy days per year.

Guareí has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.0 °C (on 6 October 2020) and the coldest -0.3 °C (on 29 July 1990).

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

GuareíSão Paulo

coords: -23.37°, -48.18°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthFebruaryColdest monthJulyWettest monthJanuaryDriest monthAugust

Mean daily temperature

20.1°C

Average daily high

25.6°C

Average daily low

15.8°C

Annual rainfall

1,491mm

Sunshine / day

9.3h

Mean relative humidity

79%

Average peak wind

14.5km/h

Seasonal range

6.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

47 d/yr

Rainy days (≥ 1 mm)

151 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.4 °C

Average feels-like low

16.1 °C

Average peak gust

32.9 km/h

Tropical nights (≥ 20 °C)

37 d/yr

Solar radiation

17.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.62 · 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

39.0 °C

6 October 2020

Coldest day

-0.3 °C

29 July 1990

Wettest day

119 mm

29 January 2022

Windiest day

38.8 km/h

28 November 1950

Strongest gust

90.4 km/h

22 September 2025

Hottest feels-like

41.2 °C

29 October 2007

Coldest feels-like

-3.7 °C

29 July 1990

Sunniest day

13.4 h

11 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.8 °C30 September 2025	1.1 °C25 June 2025	20.6 °C	1,039 mm	88	0
2024	36.4 °C26 September 2024	4.1 °C27 August 2024	21.8 °C	1,142 mm	126	0
2023	37.3 °C24 September 2023	6.6 °C15 July 2023	21.1 °C	1,389 mm	86	0
2022	33.6 °C28 February 2022	3.7 °C13 June 2022	20.2 °C	1,429 mm	55	0
2021	36.2 °C20 September 2021	0.9 °C30 July 2021	20.5 °C	932 mm	90	0
2020	39.0 °C6 October 2020	4.7 °C28 May 2020	20.7 °C	1,076 mm	83	0
2019	37.4 °C13 October 2019	3.5 °C6 July 2019	21.4 °C	1,154 mm	103	0
2018	34.9 °C9 February 2018	5.9 °C13 July 2018	21.1 °C	1,022 mm	74	0
2017	36.1 °C12 October 2017	6.2 °C10 June 2017	21.1 °C	1,343 mm	88	0
2016	35.8 °C19 October 2016	3.5 °C13 June 2016	21.1 °C	1,454 mm	118	0
2015	37.2 °C20 January 2015	7.5 °C16 June 2015	21.7 °C	1,679 mm	89	0
2014	37.9 °C5 February 2014	5.7 °C1 July 2014	21.6 °C	1,034 mm	110	0
2013	36.2 °C27 December 2013	5.0 °C29 August 2013	20.4 °C	1,399 mm	67	0
2012	36.6 °C31 October 2012	4.6 °C14 July 2012	21.0 °C	1,599 mm	92	0
2011	36.0 °C30 September 2011	3.6 °C28 June 2011	20.5 °C	1,326 mm	82	0
2010	34.5 °C13 March 2010	5.8 °C8 June 2010	20.7 °C	1,477 mm	86	0
2009	34.0 °C5 March 2009	3.6 °C4 June 2009	20.7 °C	1,709 mm	60	0
2008	34.7 °C15 October 2008	3.8 °C17 June 2008	20.2 °C	1,455 mm	43	0
2007	34.8 °C23 September 2007	5.0 °C26 July 2007	21.0 °C	1,423 mm	77	0
2006	34.7 °C15 September 2006	4.8 °C6 September 2006	20.7 °C	1,237 mm	57	0
2005	34.8 °C13 October 2005	6.6 °C26 July 2005	20.7 °C	1,363 mm	51	0
2004	35.7 °C26 September 2004	5.5 °C14 June 2004	20.0 °C	1,462 mm	39	0
2003	34.0 °C16 December 2003	5.4 °C18 August 2003	20.4 °C	1,447 mm	61	0
2002	36.3 °C11 October 2002	4.5 °C3 September 2002	21.4 °C	1,242 mm	96	0
2001	34.6 °C7 November 2001	3.1 °C21 June 2001	20.7 °C	1,536 mm	62	0
2000	35.3 °C23 October 2000	1.8 °C17 July 2000	20.3 °C	1,544 mm	56	0
1999	34.7 °C21 January 1999	5.4 °C18 April 1999	20.2 °C	1,622 mm	63	0
1998	33.7 °C3 December 1998	7.9 °C10 June 1998	20.4 °C	1,692 mm	59	0
1997	34.7 °C9 September 1997	5.1 °C9 June 1997	20.5 °C	1,872 mm	66	0
1996	33.8 °C30 January 1996	5.1 °C12 July 1996	20.2 °C	1,854 mm	50	0
1995	34.2 °C11 September 1995	5.9 °C5 June 1995	20.5 °C	1,943 mm	56	0
1994	35.7 °C13 October 1994	1.3 °C27 June 1994	20.7 °C	1,484 mm	75	0
1993	34.7 °C2 January 1993	3.2 °C1 August 1993	20.4 °C	1,508 mm	55	0
1992	32.1 °C15 November 1992	5.8 °C20 July 1992	20.0 °C	1,438 mm	29	0
1991	33.7 °C16 October 1991	3.0 °C24 July 1991	20.1 °C	1,605 mm	41	0
1990	34.2 °C11 October 1990	-0.3 °C29 July 1990	20.3 °C	1,415 mm	82	1
1989	33.2 °C25 October 1989	5.2 °C20 July 1989	19.7 °C	1,696 mm	29	0
1988	35.9 °C27 September 1988	1.4 °C6 June 1988	20.0 °C	1,568 mm	52	0
1987	32.9 °C15 September 1987	3.8 °C8 August 1987	20.1 °C	1,540 mm	56	0
1986	33.7 °C1 November 1986	5.2 °C2 June 1986	20.5 °C	1,596 mm	46	0
1985	37.2 °C17 November 1985	4.4 °C8 June 1985	20.3 °C	1,142 mm	59	0
1984	34.1 °C5 February 1984	2.5 °C27 August 1984	20.8 °C	1,227 mm	62	0
1983	32.0 °C17 February 1983	4.9 °C16 June 1983	20.2 °C	2,374 mm	25	0
1982	32.2 °C2 November 1982	7.6 °C30 July 1982	20.1 °C	1,715 mm	28	0
1981	32.8 °C19 September 1981	-0.1 °C20 June 1981	19.9 °C	1,394 mm	32	1
1980	32.8 °C20 October 1980	3.8 °C28 June 1980	20.1 °C	1,482 mm	36	0
1979	33.0 °C7 February 1979	0.1 °C1 June 1979	19.4 °C	1,325 mm	38	0
1978	33.8 °C24 January 1978	2.6 °C16 August 1978	20.0 °C	1,228 mm	50	0
1977	34.5 °C11 March 1977	6.4 °C17 May 1977	20.8 °C	1,404 mm	65	0
1976	33.4 °C19 January 1976	5.7 °C16 August 1976	19.4 °C	2,042 mm	26	0
1975	33.3 °C10 September 1975	0.9 °C18 July 1975	20.1 °C	1,305 mm	54	0
1974	33.6 °C19 November 1974	3.6 °C17 August 1974	19.7 °C	1,631 mm	38	0
1973	34.3 °C22 February 1973	3.1 °C20 June 1973	20.2 °C	1,560 mm	44	0
1972	33.5 °C26 October 1972	1.7 °C9 July 1972	20.0 °C	1,679 mm	28	0
1971	34.5 °C26 January 1971	4.7 °C7 July 1971	19.9 °C	1,105 mm	52	0
1970	33.3 °C8 December 1970	6.7 °C13 August 1970	20.0 °C	1,287 mm	31	0
1969	33.6 °C11 September 1969	1.9 °C11 July 1969	20.3 °C	920 mm	63	0
1968	35.7 °C7 October 1968	2.2 °C18 May 1968	19.3 °C	973 mm	48	0
1967	33.0 °C9 October 1967	2.8 °C9 June 1967	20.2 °C	1,242 mm	35	0
1966	32.3 °C12 September 1966	2.6 °C7 August 1966	19.3 °C	1,538 mm	18	0
1965	32.4 °C10 September 1965	2.1 °C12 July 1965	19.2 °C	1,772 mm	9	0
1964	30.0 °C14 March 1964	5.7 °C6 June 1964	18.7 °C	1,541 mm	1	0
1963	36.3 °C17 October 1963	4.0 °C22 June 1963	20.3 °C	1,342 mm	53	0
1962	32.0 °C8 September 1962	3.3 °C18 July 1962	18.4 °C	1,680 mm	6	0
1961	37.3 °C28 September 1961	8.9 °C5 August 1961	20.6 °C	1,343 mm	46	0
1960	34.2 °C24 September 1960	5.2 °C15 July 1960	19.0 °C	1,629 mm	9	0
1959	33.1 °C7 September 1959	6.2 °C7 June 1959	20.2 °C	1,318 mm	29	0
1958	32.7 °C15 November 1958	5.5 °C23 June 1958	19.6 °C	1,581 mm	32	0
1957	33.7 °C19 October 1957	3.1 °C22 July 1957	19.2 °C	1,711 mm	8	0
1956	32.8 °C8 October 1956	5.0 °C22 July 1956	18.8 °C	1,376 mm	31	0
1955	35.0 °C1 October 1955	5.3 °C23 May 1955	19.2 °C	1,429 mm	25	0
1954	33.5 °C19 September 1954	5.1 °C21 June 1954	19.7 °C	1,389 mm	15	0
1953	32.4 °C21 August 1953	8.1 °C13 July 1953	19.8 °C	1,437 mm	4	0
1952	33.6 °C30 September 1952	4.7 °C16 July 1952	19.4 °C	1,265 mm	13	0
1951	32.5 °C26 September 1951	7.3 °C15 July 1951	19.4 °C	1,286 mm	20	0
1950	33.1 °C17 September 1950	6.1 °C12 July 1950	19.2 °C	1,794 mm	14	0
1949	30.6 °C18 March 1949	7.4 °C16 May 1949	19.0 °C	2,212 mm	3	0
1948	35.8 °C26 September 1948	5.8 °C15 June 1948	19.5 °C	1,434 mm	17	0
1947	32.2 °C8 January 1947	4.4 °C2 September 1947	18.8 °C	2,005 mm	10	0
1946	30.1 °C18 October 1946	5.2 °C4 June 1946	19.6 °C	2,417 mm	1	0
1945	31.1 °C28 September 1945	7.5 °C25 June 1945	19.4 °C	2,296 mm	1	0
1944	34.7 °C7 September 1944	7.0 °C15 July 1944	19.9 °C	1,454 mm	19	0
1943	31.9 °C17 January 1943	7.6 °C6 September 1943	18.9 °C	1,121 mm	12	0
1942	37.1 °C27 November 1942	4.5 °C19 June 1942	19.5 °C	1,027 mm	41	0
1941	30.8 °C9 January 1941	6.4 °C4 September 1941	19.4 °C	2,241 mm	3	0
1940	31.9 °C23 August 1940	6.6 °C19 August 1940	19.8 °C	1,789 mm	5	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

26.6 °C

+1.0 °C

Hot days (≥ 30 °C)

88 d/yr

+41

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1039 mm

-452 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.2 °C	+1.4 °C	246 mm	-4 mm
Feb	30.5 °C	+2.5 °C	132 mm	-79 mm
Mar	29.9 °C	+2.5 °C	61 mm	-96 mm
Apr	26.0 °C	+0.2 °C	106 mm	+35 mm
May	24.9 °C	+1.5 °C	12 mm	-58 mm
Jun	22.3 °C	0.0 °C	60 mm	+4 mm
Jul	21.8 °C	-0.6 °C	5 mm	-43 mm
Aug	24.8 °C	+0.4 °C	7 mm	-36 mm
Sep	27.7 °C	+1.9 °C	13 mm	-70 mm
Oct	26.2 °C	-0.1 °C	125 mm	-14 mm
Nov	26.8 °C	0.0 °C	103 mm	-47 mm
Dec	29.6 °C	+2.3 °C	171 mm	-43 mm

The year's extremes

Hottest day

34.8 °C

30 Sep 2025

Coldest day

1.1 °C

25 Jun 2025

Wettest day

49.5 mm

9 Dec 2025

Windiest day

35.5 km/h

10 Dec 2025

Strongest gust

90.4 km/h

22 Sep 2025

Hottest feels-like

39.7 °C

26 Dec 2025

Coldest feels-like

-2.7 °C

25 Jun 2025

Sunniest day

13.4 h

11 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 Guareí?

Guareí has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.1 °C and it receives 1,491 mm of precipitation per year.

What is the hottest day ever recorded in Guareí?

The hottest day measured in Guareí between 1940 and 2025 was 6 October 2020, reaching 39.0 °C.

What is the coldest day in Guareí?

The coldest day measured in Guareí between 1940 and 2025 was 29 July 1990, at -0.3 °C.

Does it snow in Guareí?

Almost never: Guareí sees virtually no snow, with about 0 frost days per year.

Has the climate of Guareí warmed?

Yes: Guareí warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Guareí?

The wettest day measured in Guareí between 1940 and 2025 was 29 January 2022, with 119 mm of rain in 24 hours.

What was the windiest day in Guareí?

The windiest day measured in Guareí between 1940 and 2025 was 28 November 1950, with winds reaching 38.8 km/h.

What is the warmest month in Guareí?

The warmest month in Guareí is February (23.0 °C on average); the coldest is July (16.4 °C).

How much does it rain in Guareí?

Guareí receives on average 1,491 mm of precipitation per year, spread over about 151 rainy days.

Is it sunny in Guareí?

Guareí gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Are there tropical nights in Guareí?

Yes: Guareí has on average 37 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Guareí?

In Guareí, between 1940 and 2025, the highest apparent temperature reached 41.2 °C on 29 October 2007, and the lowest was -3.7 °C on 29 July 1990.

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