Santa Inês climate — normals and trends

Q: What is the climate of Santa Inês?

Santa Inês has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 1,598 mm of precipitation per year.

Q: What is the hottest day ever recorded in Santa Inês?

The hottest day measured in Santa Inês between 1940 and 2025 was 12 December 1946, reaching 39.1 °C.

Q: What is the coldest day in Santa Inês?

The coldest day measured in Santa Inês between 1940 and 2025 was 8 August 2020, at 19.2 °C.

Q: Does it snow in Santa Inês?

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

Q: Has the climate of Santa Inês warmed?

Yes: Santa Inês warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Santa Inês?

The wettest day measured in Santa Inês between 1940 and 2025 was 27 December 1993, with 327 mm of rain in 24 hours.

Q: What was the windiest day in Santa Inês?

The windiest day measured in Santa Inês between 1940 and 2025 was 16 July 1988, with winds reaching 24.2 km/h.

Q: What is the warmest month in Santa Inês?

The warmest month in Santa Inês is October (29.1 °C on average); the coldest is March (25.9 °C).

Q: How much does it rain in Santa Inês?

Santa Inês receives on average 1,598 mm of precipitation per year, spread over about 182 rainy days.

Q: Is it sunny in Santa Inês?

Santa Inês gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Santa Inês (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.2 °C and it receives 1,598 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 (29.1 °C on average) and the coldest is March (25.9 °C). Rainfall peaks in March.

Santa Inês averages 0 frost days, 292 hot days (≥ 30 °C) and 182 rainy days per year.

Santa Inês has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.1 °C (on 12 December 1946) and the coldest 19.2 °C (on 8 August 2020).

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

Santa InêsMaranhão

coords: -3.67°, -45.38°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthOctoberColdest monthMarchWettest monthMarchDriest monthAugust

Mean daily temperature

27.2°C

Average daily high

32.1°C

Average daily low

23.5°C

Annual rainfall

1,598mm

Sunshine / day

10.4h

Mean relative humidity

78%

Average peak wind

11.8km/h

Seasonal range

3.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

292 d/yr

Rainy days (≥ 1 mm)

182 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.9 °C

Average feels-like low

27.7 °C

Average peak gust

31.7 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

18.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °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

39.1 °C

12 December 1946

Coldest day

19.2 °C

8 August 2020

Wettest day

327 mm

27 December 1993

Windiest day

24.2 km/h

16 July 1988

Strongest gust

57.6 km/h

4 October 1947

Hottest feels-like

43.8 °C

12 September 2015

Coldest feels-like

19.9 °C

4 July 1974

Sunniest day

12.0 h

2 January 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.1 °C27 October 2025	19.8 °C14 July 2025	27.8 °C	1,572 mm	337
2024	37.4 °C10 October 2024	19.8 °C17 July 2024	28.4 °C	1,146 mm	348
2023	37.2 °C25 September 2023	20.7 °C22 July 2023	27.9 °C	1,401 mm	332
2022	36.7 °C19 October 2022	20.1 °C22 July 2022	27.4 °C	1,671 mm	313
2021	35.8 °C28 August 2021	19.4 °C3 August 2021	27.4 °C	1,422 mm	325
2020	37.3 °C8 October 2020	19.2 °C8 August 2020	27.7 °C	1,737 mm	329
2019	36.5 °C21 September 2019	20.8 °C19 July 2019	27.8 °C	1,732 mm	344
2018	36.8 °C28 September 2018	20.6 °C6 July 2018	27.5 °C	1,883 mm	332
2017	38.6 °C4 December 2017	20.0 °C19 July 2017	28.2 °C	1,638 mm	338
2016	38.2 °C25 November 2016	19.8 °C27 July 2016	28.4 °C	1,322 mm	350
2015	38.6 °C1 December 2015	21.5 °C13 August 2015	28.1 °C	1,290 mm	344
2014	36.9 °C11 October 2014	21.1 °C14 August 2014	27.6 °C	1,645 mm	331
2013	36.4 °C19 September 2013	20.8 °C3 August 2013	27.8 °C	1,697 mm	343
2012	38.5 °C24 October 2012	20.0 °C17 July 2012	27.9 °C	1,417 mm	341
2011	37.7 °C25 September 2011	20.2 °C29 July 2011	27.5 °C	1,842 mm	324
2010	38.5 °C15 September 2010	20.2 °C27 June 2010	28.3 °C	1,393 mm	349
2009	37.2 °C1 November 2009	21.1 °C26 July 2009	27.5 °C	2,158 mm	326
2008	37.7 °C2 December 2008	20.3 °C23 June 2008	27.7 °C	1,688 mm	325
2007	37.7 °C26 October 2007	20.8 °C30 July 2007	28.1 °C	1,399 mm	333
2006	37.7 °C2 November 2006	21.1 °C5 August 2006	27.8 °C	1,656 mm	319
2005	38.8 °C18 November 2005	20.9 °C25 July 2005	28.1 °C	1,420 mm	335
2004	36.9 °C23 November 2004	20.9 °C5 August 2004	27.6 °C	1,627 mm	326
2003	36.3 °C4 October 2003	20.6 °C19 July 2003	27.4 °C	1,711 mm	331
2002	37.7 °C22 October 2002	21.2 °C4 July 2002	27.4 °C	1,729 mm	323
2001	37.0 °C18 October 2001	20.0 °C3 August 2001	27.2 °C	1,522 mm	314
2000	37.5 °C28 November 2000	21.0 °C24 July 2000	27.0 °C	1,636 mm	317
1999	36.5 °C10 November 1999	20.6 °C5 July 1999	27.0 °C	2,052 mm	319
1998	37.5 °C30 October 1998	21.2 °C25 June 1998	27.8 °C	1,461 mm	340
1997	37.4 °C27 September 1997	21.1 °C10 July 1997	27.4 °C	1,479 mm	315
1996	36.3 °C4 November 1996	20.2 °C4 July 1996	27.1 °C	1,942 mm	315
1995	37.7 °C15 October 1995	20.1 °C14 July 1995	27.1 °C	1,662 mm	304
1994	35.4 °C6 December 1994	21.0 °C28 July 1994	26.9 °C	1,886 mm	296
1993	36.2 °C7 December 1993	21.1 °C21 July 1993	27.3 °C	1,776 mm	324
1992	37.4 °C13 January 1992	20.5 °C22 July 1992	27.5 °C	1,226 mm	328
1991	36.9 °C24 September 1991	21.0 °C30 July 1991	27.3 °C	1,521 mm	304
1990	35.9 °C1 November 1990	21.1 °C8 August 1990	27.2 °C	1,057 mm	328
1989	35.1 °C5 October 1989	21.0 °C30 July 1989	26.7 °C	1,993 mm	276
1988	36.3 °C20 October 1988	20.2 °C3 August 1988	27.0 °C	1,620 mm	307
1987	37.5 °C28 November 1987	21.6 °C28 June 1987	27.6 °C	1,443 mm	330
1986	35.1 °C25 September 1986	21.5 °C8 June 1986	26.6 °C	2,324 mm	274
1985	36.4 °C22 October 1985	21.0 °C22 July 1985	26.3 °C	2,388 mm	234
1984	35.1 °C17 December 1984	20.0 °C27 July 1984	26.5 °C	1,873 mm	274
1983	36.5 °C3 November 1983	21.8 °C26 July 1983	27.6 °C	1,174 mm	337
1982	37.7 °C20 December 1982	21.3 °C1 July 1982	27.2 °C	1,556 mm	302
1981	38.9 °C12 December 1981	20.4 °C28 July 1981	27.6 °C	1,156 mm	329
1980	36.8 °C7 December 1980	21.2 °C3 August 1980	27.0 °C	1,749 mm	312
1979	35.7 °C10 August 1979	20.5 °C17 June 1979	26.8 °C	1,662 mm	306
1978	35.4 °C26 November 1978	20.9 °C5 August 1978	26.5 °C	2,157 mm	280
1977	37.1 °C22 November 1977	20.6 °C24 July 1977	26.6 °C	2,370 mm	259
1976	36.1 °C23 September 1976	19.7 °C20 July 1976	26.4 °C	1,745 mm	257
1975	34.6 °C12 November 1975	19.5 °C28 July 1975	26.2 °C	1,799 mm	243
1974	34.8 °C30 October 1974	20.1 °C12 June 1974	25.9 °C	2,334 mm	225
1973	35.7 °C16 November 1973	21.1 °C2 August 1973	26.4 °C	2,113 mm	268
1972	35.8 °C16 November 1972	20.9 °C22 July 1972	26.6 °C	1,729 mm	280
1971	35.5 °C13 December 1971	19.7 °C11 July 1971	26.2 °C	1,948 mm	238
1970	35.9 °C6 October 1970	20.2 °C24 July 1970	26.8 °C	1,620 mm	295
1969	36.0 °C26 November 1969	21.0 °C27 July 1969	27.3 °C	1,207 mm	322
1968	36.3 °C18 October 1968	20.1 °C15 June 1968	26.6 °C	1,603 mm	255
1967	36.7 °C10 December 1967	20.6 °C17 February 1967	26.7 °C	1,895 mm	247
1966	37.3 °C25 October 1966	21.5 °C5 August 1966	26.9 °C	1,863 mm	239
1965	38.0 °C7 November 1965	21.4 °C7 July 1965	27.2 °C	1,097 mm	251
1964	36.6 °C9 November 1964	21.4 °C3 June 1964	26.8 °C	1,570 mm	214
1963	37.4 °C29 October 1963	21.1 °C17 June 1963	27.2 °C	1,516 mm	251
1962	37.6 °C3 October 1962	19.9 °C20 June 1962	26.9 °C	1,522 mm	245
1961	38.2 °C16 October 1961	20.9 °C21 June 1961	26.9 °C	1,551 mm	241
1960	37.9 °C8 December 1960	21.2 °C10 July 1960	27.0 °C	1,745 mm	237
1959	37.3 °C16 October 1959	19.5 °C7 July 1959	26.9 °C	2,004 mm	236
1958	38.3 °C26 October 1958	21.7 °C3 March 1958	28.0 °C	968 mm	328
1957	38.0 °C4 November 1957	21.6 °C22 January 1957	27.2 °C	1,626 mm	251
1956	37.3 °C6 November 1956	21.1 °C22 June 1956	26.6 °C	1,512 mm	222
1955	37.6 °C22 September 1955	21.1 °C16 July 1955	26.8 °C	1,450 mm	224
1954	37.9 °C7 September 1954	20.8 °C23 July 1954	26.9 °C	1,236 mm	250
1953	37.3 °C22 October 1953	20.6 °C13 July 1953	27.0 °C	1,299 mm	257
1952	37.3 °C4 November 1952	21.2 °C30 June 1952	26.9 °C	1,537 mm	242
1951	37.4 °C8 December 1951	21.5 °C10 June 1951	27.5 °C	1,031 mm	304
1950	38.1 °C10 December 1950	20.8 °C14 July 1950	27.2 °C	1,340 mm	243
1949	37.4 °C21 October 1949	21.4 °C24 July 1949	26.9 °C	1,454 mm	232
1948	37.2 °C5 November 1948	21.6 °C12 August 1948	27.2 °C	1,239 mm	264
1947	37.6 °C9 October 1947	21.4 °C29 May 1947	26.8 °C	1,594 mm	243
1946	39.1 °C12 December 1946	21.5 °C9 January 1946	27.6 °C	815 mm	312
1945	37.5 °C10 November 1945	20.9 °C12 January 1945	27.1 °C	1,297 mm	266
1944	38.3 °C28 September 1944	21.6 °C26 June 1944	27.4 °C	1,639 mm	248
1943	37.0 °C24 October 1943	21.1 °C14 May 1943	26.4 °C	1,816 mm	210
1942	38.4 °C20 November 1942	21.1 °C9 July 1942	27.4 °C	1,338 mm	309
1941	38.9 °C17 October 1941	21.8 °C16 June 1941	27.9 °C	940 mm	323
1940	36.6 °C25 October 1940	20.8 °C6 July 1940	26.9 °C	1,582 mm	242

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

32.8 °C

+0.7 °C

Hot days (≥ 30 °C)

337 d/yr

+45

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1572 mm

-26 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.6 °C	+0.7 °C	308 mm	+58 mm
Feb	30.8 °C	+0.5 °C	364 mm	+86 mm
Mar	31.2 °C	+1.1 °C	422 mm	+82 mm
Apr	31.6 °C	+1.4 °C	188 mm	-99 mm
May	31.7 °C	+1.2 °C	79 mm	-78 mm
Jun	31.5 °C	+0.6 °C	46 mm	-8 mm
Jul	32.6 °C	+0.7 °C	32 mm	+3 mm
Aug	33.4 °C	-0.2 °C	13 mm	+0 mm
Sep	35.4 °C	+0.9 °C	3 mm	-11 mm
Oct	35.5 °C	+0.7 °C	5 mm	-15 mm
Nov	35.0 °C	+0.6 °C	9 mm	-33 mm
Dec	33.1 °C	+0.2 °C	103 mm	-13 mm

The year's extremes

Hottest day

37.1 °C

27 Oct 2025

Coldest day

19.8 °C

14 Jul 2025

Wettest day

83.8 mm

14 Feb 2025

Windiest day

21.8 km/h

19 May 2025

Strongest gust

51.1 km/h

14 Oct 2025

Hottest feels-like

41.4 °C

18 Apr 2025

Coldest feels-like

22.5 °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 Santa Inês?

Santa Inês has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 1,598 mm of precipitation per year.

What is the hottest day ever recorded in Santa Inês?

The hottest day measured in Santa Inês between 1940 and 2025 was 12 December 1946, reaching 39.1 °C.

What is the coldest day in Santa Inês?

The coldest day measured in Santa Inês between 1940 and 2025 was 8 August 2020, at 19.2 °C.

Does it snow in Santa Inês?

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

Has the climate of Santa Inês warmed?

Yes: Santa Inês warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Santa Inês?

The wettest day measured in Santa Inês between 1940 and 2025 was 27 December 1993, with 327 mm of rain in 24 hours.

What was the windiest day in Santa Inês?

The windiest day measured in Santa Inês between 1940 and 2025 was 16 July 1988, with winds reaching 24.2 km/h.

What is the warmest month in Santa Inês?

The warmest month in Santa Inês is October (29.1 °C on average); the coldest is March (25.9 °C).

How much does it rain in Santa Inês?

Santa Inês receives on average 1,598 mm of precipitation per year, spread over about 182 rainy days.

Is it sunny in Santa Inês?

Santa Inês gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Are there tropical nights in Santa Inês?

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

What was the most extreme apparent temperature in Santa Inês?

In Santa Inês, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 12 September 2015, and the lowest was 19.9 °C on 4 July 1974.

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