São Mateus do Maranhão climate — normals and trends

Q: What is the climate of São Mateus do Maranhão?

São Mateus do Maranhão has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.7 °C and it receives 1,417 mm of precipitation per year.

Q: What is the hottest day ever recorded in São Mateus do Maranhão?

The hottest day measured in São Mateus do Maranhão between 1940 and 2025 was 24 October 2012, reaching 40.3 °C.

Q: What is the coldest day in São Mateus do Maranhão?

The coldest day measured in São Mateus do Maranhão between 1940 and 2025 was 22 August 2022, at 19.0 °C.

Q: Does it snow in São Mateus do Maranhão?

Almost never: São Mateus do Maranhão sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of São Mateus do Maranhão warmed?

Yes: São Mateus do Maranhão warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in São Mateus do Maranhão?

The wettest day measured in São Mateus do Maranhão between 1940 and 2025 was 31 March 2023, with 182 mm of rain in 24 hours.

Q: What was the windiest day in São Mateus do Maranhão?

The windiest day measured in São Mateus do Maranhão between 1940 and 2025 was 16 August 1991, with winds reaching 27.0 km/h.

Q: What is the warmest month in São Mateus do Maranhão?

The warmest month in São Mateus do Maranhão is October (29.7 °C on average); the coldest is March (26.0 °C).

Q: How much does it rain in São Mateus do Maranhão?

São Mateus do Maranhão receives on average 1,417 mm of precipitation per year, spread over about 165 rainy days.

Q: Is it sunny in São Mateus do Maranhão?

São Mateus do Maranhão gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.

São Mateus do Maranhão (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.7 °C and it receives 1,417 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 October (29.7 °C on average) and the coldest is March (26.0 °C). Rainfall peaks in March.

São Mateus do Maranhão averages 0 frost days, 304 hot days (≥ 30 °C) and 165 rainy days per year.

São Mateus do Maranhão has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.3 °C (on 24 October 2012) and the coldest 19.0 °C (on 22 August 2022).

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

São Mateus do MaranhãoMaranhão

coords: -4.04°, -44.48°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthOctoberColdest monthMarchWettest monthMarchDriest monthAugust

Mean daily temperature

27.7°C

Average daily high

32.5°C

Average daily low

23.8°C

Annual rainfall

1,417mm

Sunshine / day

10.7h

Mean relative humidity

74%

Average peak wind

12.5km/h

Seasonal range

3.7°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

304 d/yr

Rainy days (≥ 1 mm)

165 d/yr

Annual snowfall

0.0 cm

Average feels-like high

37.0 °C

Average feels-like low

27.7 °C

Average peak gust

31.2 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

19.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.8 °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

40.3 °C

24 October 2012

Coldest day

19.0 °C

22 August 2022

Wettest day

182 mm

31 March 2023

Windiest day

27.0 km/h

16 August 1991

Strongest gust

55.4 km/h

15 October 1961

Hottest feels-like

43.8 °C

13 November 2016

Coldest feels-like

18.2 °C

3 August 2001

Sunniest day

12.0 h

2 January 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.7 °C25 November 2025	20.8 °C14 July 2025	28.3 °C	1,255 mm	347
2024	37.7 °C13 October 2024	19.2 °C26 July 2024	28.4 °C	1,029 mm	347
2023	37.4 °C10 November 2023	20.9 °C15 August 2023	28.1 °C	1,341 mm	332
2022	37.5 °C31 October 2022	19.0 °C22 August 2022	27.5 °C	1,490 mm	324
2021	36.2 °C5 September 2021	20.4 °C24 July 2021	27.8 °C	1,404 mm	336
2020	37.8 °C21 October 2020	19.2 °C8 August 2020	28.0 °C	1,793 mm	343
2019	37.5 °C27 October 2019	21.0 °C11 August 2019	28.2 °C	1,480 mm	349
2018	38.1 °C20 November 2018	20.8 °C17 July 2018	28.0 °C	1,518 mm	333
2017	39.6 °C5 December 2017	20.1 °C19 July 2017	28.6 °C	1,385 mm	342
2016	39.1 °C23 November 2016	19.8 °C27 July 2016	28.9 °C	1,097 mm	350
2015	39.5 °C2 December 2015	21.1 °C15 July 2015	28.7 °C	1,237 mm	351
2014	37.8 °C9 October 2014	21.6 °C14 August 2014	28.1 °C	1,291 mm	340
2013	38.1 °C9 November 2013	22.2 °C7 July 2013	28.5 °C	1,306 mm	356
2012	40.3 °C24 October 2012	20.8 °C30 July 2012	28.7 °C	1,220 mm	351
2011	38.7 °C25 September 2011	20.9 °C19 July 2011	28.0 °C	1,686 mm	329
2010	38.6 °C9 October 2010	20.0 °C27 June 2010	28.7 °C	1,302 mm	349
2009	37.8 °C28 November 2009	21.2 °C27 July 2009	27.9 °C	1,945 mm	330
2008	38.5 °C25 November 2008	20.3 °C7 August 2008	28.0 °C	1,525 mm	323
2007	38.5 °C8 November 2007	20.6 °C22 June 2007	28.4 °C	1,226 mm	344
2006	38.0 °C8 October 2006	20.5 °C7 August 2006	28.1 °C	1,492 mm	327
2005	39.3 °C18 November 2005	21.3 °C25 July 2005	28.4 °C	1,283 mm	343
2004	38.3 °C18 November 2004	20.7 °C5 August 2004	28.0 °C	1,427 mm	335
2003	37.1 °C19 October 2003	20.4 °C16 July 2003	27.8 °C	1,653 mm	335
2002	37.8 °C22 October 2002	21.6 °C4 July 2002	27.8 °C	1,534 mm	327
2001	37.5 °C18 October 2001	19.8 °C3 August 2001	27.4 °C	1,557 mm	319
2000	38.4 °C7 November 2000	21.1 °C31 July 2000	27.2 °C	1,498 mm	307
1999	38.3 °C10 November 1999	20.4 °C4 July 1999	27.4 °C	1,811 mm	317
1998	38.1 °C30 October 1998	21.6 °C25 July 1998	28.3 °C	1,205 mm	348
1997	37.8 °C11 October 1997	21.0 °C16 June 1997	27.7 °C	1,528 mm	323
1996	37.2 °C4 November 1996	20.4 °C3 July 1996	27.5 °C	1,786 mm	314
1995	37.9 °C15 October 1995	20.5 °C13 July 1995	27.4 °C	1,740 mm	312
1994	37.2 °C18 December 1994	20.9 °C30 July 1994	27.4 °C	1,743 mm	316
1993	38.6 °C10 December 1993	21.2 °C18 July 1993	28.0 °C	1,410 mm	331
1992	38.9 °C13 January 1992	20.3 °C22 July 1992	28.2 °C	999 mm	337
1991	37.3 °C9 December 1991	20.8 °C30 July 1991	27.7 °C	1,151 mm	328
1990	36.4 °C16 October 1990	21.0 °C8 August 1990	27.6 °C	1,007 mm	337
1989	35.9 °C6 December 1989	21.6 °C16 February 1989	27.1 °C	1,823 mm	290
1988	36.8 °C22 November 1988	20.2 °C3 August 1988	27.4 °C	1,702 mm	316
1987	38.4 °C28 November 1987	21.6 °C28 June 1987	28.1 °C	1,113 mm	333
1986	36.1 °C11 November 1986	21.3 °C17 June 1986	26.9 °C	2,032 mm	286
1985	37.0 °C24 October 1985	20.8 °C25 June 1985	26.7 °C	2,361 mm	244
1984	37.4 °C17 December 1984	19.1 °C27 July 1984	27.0 °C	1,707 mm	299
1983	37.1 °C16 November 1983	22.0 °C14 August 1983	28.2 °C	951 mm	344
1982	38.2 °C20 December 1982	21.6 °C6 July 1982	27.6 °C	1,290 mm	321
1981	39.6 °C12 December 1981	21.6 °C6 August 1981	28.1 °C	962 mm	334
1980	38.4 °C5 December 1980	21.7 °C16 January 1980	27.6 °C	1,523 mm	315
1979	37.4 °C2 November 1979	21.0 °C29 July 1979	27.2 °C	1,582 mm	322
1978	36.2 °C26 November 1978	21.5 °C2 August 1978	27.0 °C	1,807 mm	303
1977	37.7 °C22 November 1977	20.3 °C5 August 1977	27.0 °C	2,040 mm	279
1976	36.0 °C23 September 1976	19.7 °C20 July 1976	26.8 °C	1,490 mm	289
1975	35.6 °C11 November 1975	19.7 °C28 July 1975	26.7 °C	1,573 mm	271
1974	36.5 °C25 October 1974	19.4 °C12 June 1974	26.3 °C	2,039 mm	235
1973	36.0 °C16 November 1973	20.5 °C2 August 1973	26.8 °C	2,036 mm	300
1972	37.3 °C21 November 1972	21.0 °C22 July 1972	27.1 °C	1,515 mm	317
1971	36.1 °C26 September 1971	19.4 °C11 July 1971	26.6 °C	1,767 mm	254
1970	36.0 °C27 September 1970	20.7 °C19 July 1970	27.2 °C	1,269 mm	316
1969	36.5 °C6 October 1969	21.0 °C16 August 1969	27.5 °C	987 mm	325
1968	36.5 °C18 October 1968	20.7 °C9 June 1968	26.8 °C	1,490 mm	259
1967	36.3 °C11 November 1967	20.7 °C17 February 1967	27.0 °C	1,641 mm	260
1966	38.2 °C25 October 1966	21.7 °C10 June 1966	27.4 °C	1,643 mm	242
1965	38.9 °C15 November 1965	21.5 °C7 July 1965	27.7 °C	966 mm	263
1964	38.2 °C9 November 1964	21.2 °C3 June 1964	27.2 °C	1,299 mm	224
1963	38.8 °C16 October 1963	20.8 °C17 June 1963	27.6 °C	1,325 mm	254
1962	38.7 °C3 October 1962	20.2 °C19 June 1962	27.4 °C	1,322 mm	261
1961	39.2 °C2 November 1961	21.3 °C7 February 1961	27.4 °C	1,324 mm	249
1960	39.1 °C8 December 1960	21.6 °C22 March 1960	27.7 °C	1,485 mm	268
1959	38.6 °C1 December 1959	21.2 °C7 July 1959	27.5 °C	1,688 mm	250
1958	39.2 °C18 October 1958	21.9 °C4 March 1958	28.5 °C	998 mm	331
1957	39.1 °C5 November 1957	21.5 °C29 January 1957	27.7 °C	1,251 mm	258
1956	38.1 °C6 November 1956	21.1 °C16 March 1956	27.3 °C	1,236 mm	260
1955	38.7 °C9 October 1955	20.6 °C16 July 1955	27.3 °C	1,205 mm	248
1954	38.0 °C18 October 1954	21.5 °C9 July 1954	27.4 °C	1,057 mm	280
1953	38.8 °C3 November 1953	21.3 °C13 July 1953	27.5 °C	1,156 mm	271
1952	38.1 °C9 October 1952	21.3 °C30 June 1952	27.4 °C	1,652 mm	261
1951	38.3 °C4 December 1951	21.6 °C30 March 1951	28.0 °C	891 mm	312
1950	39.2 °C10 December 1950	21.5 °C15 July 1950	27.8 °C	1,195 mm	253
1949	38.9 °C21 October 1949	21.6 °C18 May 1949	27.4 °C	1,265 mm	246
1948	38.7 °C5 November 1948	21.5 °C10 February 1948	27.8 °C	1,193 mm	279
1947	38.6 °C7 October 1947	21.6 °C11 July 1947	27.3 °C	1,451 mm	273
1946	40.0 °C12 December 1946	21.7 °C23 June 1946	28.3 °C	806 mm	314
1945	39.1 °C10 November 1945	20.9 °C18 June 1945	27.6 °C	1,164 mm	274
1944	39.4 °C3 November 1944	21.4 °C31 May 1944	27.8 °C	1,659 mm	254
1943	38.3 °C24 October 1943	21.3 °C4 May 1943	27.0 °C	1,520 mm	240
1942	39.6 °C20 November 1942	21.7 °C9 July 1942	28.4 °C	942 mm	334
1941	39.8 °C18 October 1941	22.0 °C15 June 1941	28.7 °C	781 mm	328
1940	37.4 °C25 October 1940	20.5 °C6 July 1940	27.4 °C	1,309 mm	247

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

33.3 °C

+0.8 °C

Hot days (≥ 30 °C)

347 d/yr

+43

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1255 mm

-162 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	32.3 °C	+1.0 °C	286 mm	+62 mm
Feb	31.1 °C	+0.5 °C	306 mm	+49 mm
Mar	31.2 °C	+1.0 °C	318 mm	+9 mm
Apr	31.9 °C	+1.6 °C	152 mm	-106 mm
May	31.9 °C	+1.2 °C	71 mm	-59 mm
Jun	32.0 °C	+0.6 °C	27 mm	-12 mm
Jul	33.5 °C	+0.9 °C	10 mm	-8 mm
Aug	34.4 °C	+0.2 °C	4 mm	-4 mm
Sep	35.9 °C	+0.7 °C	2 mm	-7 mm
Oct	36.1 °C	+0.6 °C	5 mm	-9 mm
Nov	35.8 °C	+0.8 °C	7 mm	-32 mm
Dec	33.8 °C	+0.3 °C	66 mm	-45 mm

The year's extremes

Hottest day

38.7 °C

25 Nov 2025

Coldest day

20.8 °C

14 Jul 2025

Wettest day

75.3 mm

14 Feb 2025

Windiest day

22.2 km/h

19 May 2025

Strongest gust

47.2 km/h

29 Nov 2025

Hottest feels-like

41.4 °C

14 Apr 2025

Coldest feels-like

21.2 °C

14 Jul 2025

Sunniest day

12.0 h

1 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 São Mateus do Maranhão?

São Mateus do Maranhão has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.7 °C and it receives 1,417 mm of precipitation per year.

What is the hottest day ever recorded in São Mateus do Maranhão?

The hottest day measured in São Mateus do Maranhão between 1940 and 2025 was 24 October 2012, reaching 40.3 °C.

What is the coldest day in São Mateus do Maranhão?

The coldest day measured in São Mateus do Maranhão between 1940 and 2025 was 22 August 2022, at 19.0 °C.

Does it snow in São Mateus do Maranhão?

Almost never: São Mateus do Maranhão sees virtually no snow, with about 0 frost days per year.

Has the climate of São Mateus do Maranhão warmed?

Yes: São Mateus do Maranhão warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in São Mateus do Maranhão?

The wettest day measured in São Mateus do Maranhão between 1940 and 2025 was 31 March 2023, with 182 mm of rain in 24 hours.

What was the windiest day in São Mateus do Maranhão?

The windiest day measured in São Mateus do Maranhão between 1940 and 2025 was 16 August 1991, with winds reaching 27.0 km/h.

What is the warmest month in São Mateus do Maranhão?

The warmest month in São Mateus do Maranhão is October (29.7 °C on average); the coldest is March (26.0 °C).

How much does it rain in São Mateus do Maranhão?

São Mateus do Maranhão receives on average 1,417 mm of precipitation per year, spread over about 165 rainy days.

Is it sunny in São Mateus do Maranhão?

São Mateus do Maranhão gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.

Are there tropical nights in São Mateus do Maranhão?

Yes: São Mateus do Maranhão has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in São Mateus do Maranhão?

In São Mateus do Maranhão, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 13 November 2016, and the lowest was 18.2 °C on 3 August 2001.

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