Santa Helena climate — normals and trends

Q: What is the climate of Santa Helena?

Santa Helena has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.4 °C and it receives 1,472 mm of precipitation per year.

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

The hottest day measured in Santa Helena between 1940 and 2025 was 2 October 2020, reaching 41.8 °C.

Q: What is the coldest day in Santa Helena?

The coldest day measured in Santa Helena between 1940 and 2025 was 18 July 1975, at 0.4 °C.

Q: Does it snow in Santa Helena?

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

Q: Has the climate of Santa Helena warmed?

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

Q: What is the wettest day in Santa Helena?

The wettest day measured in Santa Helena between 1940 and 2025 was 3 January 1971, with 162 mm of rain in 24 hours.

Q: What was the windiest day in Santa Helena?

The windiest day measured in Santa Helena between 1940 and 2025 was 15 September 1956, with winds reaching 57.1 km/h.

Q: What is the warmest month in Santa Helena?

The warmest month in Santa Helena is January (26.2 °C on average); the coldest is July (17.7 °C).

Q: How much does it rain in Santa Helena?

Santa Helena receives on average 1,472 mm of precipitation per year, spread over about 134 rainy days.

Q: Is it sunny in Santa Helena?

Santa Helena gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.

Santa Helena (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 22.4 °C and it receives 1,472 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 (26.2 °C on average) and the coldest is July (17.7 °C). Rainfall peaks in October.

Santa Helena averages 0 frost days, 108 hot days (≥ 30 °C) and 134 rainy days per year.

Santa Helena 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 41.8 °C (on 2 October 2020) and the coldest 0.4 °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

Santa HelenaParaná

coords: -24.86°, -54.33°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthOctoberDriest monthAugust

Mean daily temperature

22.4°C

Average daily high

27.1°C

Average daily low

18.7°C

Annual rainfall

1,472mm

Sunshine / day

9.5h

Mean relative humidity

75%

Average peak wind

15.4km/h

Seasonal range

8.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

108 d/yr

Rainy days (≥ 1 mm)

134 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.4 °C

Average feels-like low

19.4 °C

Average peak gust

32.5 km/h

Tropical nights (≥ 20 °C)

168 d/yr

Solar radiation

17.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °C

since 1940

+0.1 °C per decade · r² = 0.25 · 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

41.8 °C

2 October 2020

Coldest day

0.4 °C

18 July 1975

Wettest day

162 mm

3 January 1971

Windiest day

57.1 km/h

15 September 1956

Strongest gust

89.6 km/h

19 June 1991

Hottest feels-like

44.1 °C

17 November 1985

Coldest feels-like

-4.2 °C

18 July 1975

Sunniest day

13.3 h

3 January 1945

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.8 °C2 March 2025	3.3 °C24 June 2025	22.6 °C	1,494 mm	128
2024	38.3 °C9 September 2024	5.8 °C10 August 2024	24.0 °C	1,018 mm	185
2023	39.1 °C26 September 2023	8.5 °C14 July 2023	23.3 °C	1,273 mm	130
2022	39.2 °C23 January 2022	5.5 °C12 June 2022	22.4 °C	1,543 mm	132
2021	38.4 °C20 September 2021	3.0 °C29 July 2021	23.0 °C	984 mm	158
2020	41.8 °C2 October 2020	4.6 °C21 August 2020	23.4 °C	969 mm	166
2019	38.8 °C30 October 2019	3.1 °C6 July 2019	23.6 °C	1,288 mm	143
2018	35.6 °C23 September 2018	6.8 °C8 June 2018	22.7 °C	1,332 mm	135
2017	37.1 °C21 September 2017	2.9 °C18 July 2017	23.2 °C	1,505 mm	133
2016	38.3 °C19 October 2016	5.1 °C12 June 2016	22.2 °C	1,562 mm	127
2015	37.3 °C21 October 2015	8.0 °C12 September 2015	23.3 °C	1,964 mm	132
2014	38.7 °C8 February 2014	7.9 °C14 August 2014	23.1 °C	1,705 mm	130
2013	35.8 °C11 November 2013	3.8 °C28 August 2013	22.2 °C	1,590 mm	120
2012	37.5 °C17 September 2012	4.2 °C8 June 2012	23.2 °C	1,144 mm	167
2011	37.2 °C21 December 2011	3.1 °C27 June 2011	22.4 °C	1,308 mm	127
2010	37.5 °C5 February 2010	4.7 °C6 August 2010	22.1 °C	1,481 mm	121
2009	37.4 °C3 November 2009	3.7 °C25 July 2009	22.5 °C	1,484 mm	143
2008	38.1 °C8 December 2008	4.4 °C17 June 2008	22.4 °C	1,428 mm	132
2007	36.8 °C6 October 2007	4.0 °C26 July 2007	22.8 °C	1,127 mm	152
2006	37.4 °C16 January 2006	5.5 °C22 August 2006	23.0 °C	1,145 mm	143
2005	38.4 °C12 March 2005	5.6 °C7 July 2005	23.0 °C	1,209 mm	153
2004	38.2 °C2 March 2004	5.2 °C8 August 2004	22.5 °C	1,411 mm	142
2003	38.3 °C12 November 2003	5.0 °C12 July 2003	22.6 °C	1,220 mm	126
2002	37.7 °C7 October 2002	4.7 °C2 September 2002	23.3 °C	1,424 mm	157
2001	35.0 °C28 January 2001	3.0 °C28 July 2001	22.9 °C	1,376 mm	134
2000	37.1 °C23 January 2000	1.7 °C13 July 2000	22.4 °C	1,562 mm	142
1999	36.9 °C21 December 1999	2.8 °C15 August 1999	22.4 °C	1,184 mm	137
1998	35.2 °C27 January 1998	8.0 °C25 June 1998	22.2 °C	2,136 mm	94
1997	36.1 °C26 December 1997	5.9 °C9 June 1997	22.6 °C	1,824 mm	113
1996	34.4 °C25 December 1996	5.0 °C22 July 1996	22.0 °C	1,789 mm	91
1995	36.0 °C31 August 1995	6.1 °C26 June 1995	22.6 °C	1,605 mm	121
1994	36.5 °C26 December 1994	2.5 °C26 June 1994	22.8 °C	1,831 mm	132
1993	36.8 °C4 January 1993	3.3 °C31 July 1993	22.1 °C	1,491 mm	120
1992	35.3 °C23 December 1992	3.3 °C23 July 1992	22.1 °C	1,727 mm	111
1991	36.2 °C21 January 1991	2.6 °C2 August 1991	22.8 °C	1,365 mm	138
1990	36.5 °C2 December 1990	4.4 °C29 July 1990	22.1 °C	1,806 mm	117
1989	35.0 °C25 October 1989	2.4 °C6 July 1989	21.7 °C	1,689 mm	94
1988	37.3 °C2 October 1988	2.6 °C12 July 1988	22.4 °C	1,277 mm	136
1987	36.2 °C11 October 1987	4.3 °C24 June 1987	22.2 °C	1,927 mm	115
1986	36.2 °C16 January 1986	5.5 °C5 September 1986	22.7 °C	1,519 mm	112
1985	41.0 °C17 November 1985	4.3 °C11 July 1985	22.9 °C	920 mm	146
1984	36.7 °C17 January 1984	4.3 °C26 August 1984	22.6 °C	1,613 mm	118
1983	34.5 °C15 December 1983	6.6 °C5 June 1983	21.9 °C	2,411 mm	110
1982	35.4 °C22 October 1982	7.2 °C30 July 1982	22.5 °C	1,580 mm	99
1981	35.1 °C28 September 1981	1.9 °C19 June 1981	22.2 °C	1,415 mm	119
1980	35.7 °C26 October 1980	4.3 °C17 September 1980	22.2 °C	1,654 mm	121
1979	37.0 °C26 January 1979	5.2 °C31 May 1979	21.8 °C	1,789 mm	97
1978	37.7 °C19 February 1978	4.8 °C14 August 1978	22.7 °C	1,109 mm	137
1977	37.3 °C12 March 1977	5.6 °C17 May 1977	23.1 °C	1,367 mm	130
1976	35.5 °C19 January 1976	2.9 °C10 July 1976	21.3 °C	1,346 mm	103
1975	35.9 °C13 February 1975	0.4 °C18 July 1975	21.9 °C	1,252 mm	88
1974	34.7 °C7 February 1974	6.4 °C19 August 1974	21.6 °C	1,352 mm	90
1973	35.8 °C13 January 1973	7.4 °C27 July 1973	22.1 °C	1,697 mm	103
1972	37.3 °C27 October 1972	3.2 °C8 July 1972	22.2 °C	1,596 mm	90
1971	36.8 °C6 February 1971	4.3 °C14 June 1971	21.9 °C	1,477 mm	106
1970	37.5 °C8 December 1970	6.2 °C24 June 1970	22.4 °C	1,326 mm	112
1969	35.6 °C12 February 1969	4.5 °C9 July 1969	22.1 °C	1,152 mm	114
1968	37.3 °C25 November 1968	6.3 °C11 July 1968	21.7 °C	1,203 mm	114
1967	36.7 °C11 October 1967	5.4 °C14 June 1967	22.7 °C	1,319 mm	115
1966	34.6 °C24 January 1966	4.0 °C6 August 1966	21.9 °C	1,362 mm	89
1965	33.9 °C22 January 1965	4.5 °C11 July 1965	21.5 °C	1,649 mm	69
1964	37.0 °C13 March 1964	6.6 °C30 June 1964	21.6 °C	958 mm	93
1963	36.6 °C14 October 1963	4.2 °C6 August 1963	22.7 °C	1,291 mm	127
1962	34.7 °C3 November 1962	5.0 °C30 May 1962	21.0 °C	963 mm	87
1961	37.1 °C3 September 1961	4.6 °C16 June 1961	22.8 °C	1,267 mm	129
1960	37.6 °C10 December 1960	5.3 °C9 July 1960	21.7 °C	1,302 mm	98
1959	34.0 °C9 September 1959	7.3 °C7 June 1959	22.5 °C	1,520 mm	86
1958	36.1 °C5 January 1958	8.0 °C30 August 1958	22.3 °C	1,433 mm	86
1957	35.0 °C16 October 1957	7.4 °C21 July 1957	22.1 °C	1,560 mm	48
1956	33.8 °C6 February 1956	7.0 °C20 September 1956	21.4 °C	1,273 mm	56
1955	34.7 °C19 February 1955	3.8 °C31 July 1955	21.9 °C	1,591 mm	65
1954	34.2 °C10 December 1954	9.1 °C21 June 1954	22.2 °C	1,503 mm	67
1953	32.8 °C6 January 1953	9.1 °C6 July 1953	22.8 °C	1,369 mm	50
1952	36.6 °C16 December 1952	7.2 °C19 June 1952	22.2 °C	1,211 mm	69
1951	34.6 °C25 September 1951	9.3 °C29 August 1951	22.3 °C	1,382 mm	37
1950	32.9 °C2 September 1950	6.4 °C11 July 1950	22.0 °C	1,672 mm	31
1949	33.7 °C15 November 1949	6.7 °C14 May 1949	21.6 °C	2,155 mm	40
1948	33.7 °C24 September 1948	9.1 °C4 August 1948	22.0 °C	2,212 mm	30
1947	32.1 °C30 November 1947	7.7 °C10 July 1947	21.7 °C	2,001 mm	19
1946	31.6 °C18 October 1946	6.3 °C18 July 1946	21.8 °C	2,103 mm	20
1945	33.7 °C16 January 1945	6.6 °C10 July 1945	22.2 °C	1,561 mm	30
1944	34.7 °C26 March 1944	6.5 °C27 June 1944	23.7 °C	879 mm	115
1943	38.9 °C16 January 1943	6.7 °C29 August 1943	22.8 °C	586 mm	125
1942	41.2 °C26 November 1942	4.4 °C19 June 1942	22.4 °C	1,051 mm	136
1941	32.5 °C6 January 1941	6.3 °C15 September 1941	22.1 °C	2,412 mm	26
1940	31.5 °C21 March 1940	7.7 °C17 August 1940	21.9 °C	2,000 mm	31

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

27.6 °C

+0.5 °C

Hot days (≥ 30 °C)

128 d/yr

+20

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1494 mm

+22 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	32.7 °C	+2.1 °C	51 mm	-91 mm
Feb	33.3 °C	+2.9 °C	30 mm	-92 mm
Mar	32.1 °C	+2.3 °C	83 mm	-22 mm
Apr	25.9 °C	-1.4 °C	200 mm	+96 mm
May	25.9 °C	+2.0 °C	82 mm	-46 mm
Jun	20.8 °C	-1.4 °C	210 mm	+98 mm
Jul	23.2 °C	+0.6 °C	46 mm	-46 mm
Aug	24.2 °C	-0.5 °C	114 mm	+25 mm
Sep	27.8 °C	+1.3 °C	78 mm	-49 mm
Oct	27.0 °C	-1.1 °C	177 mm	+5 mm
Nov	29.1 °C	-0.2 °C	188 mm	+54 mm
Dec	30.1 °C	-0.1 °C	235 mm	+91 mm

The year's extremes

Hottest day

37.8 °C

2 Mar 2025

Coldest day

3.3 °C

24 Jun 2025

Wettest day

62.9 mm

12 Dec 2025

Windiest day

33.3 km/h

22 Sep 2025

Strongest gust

65.5 km/h

22 Sep 2025

Hottest feels-like

41.4 °C

18 Jan 2025

Coldest feels-like

-0.6 °C

24 Jun 2025

Sunniest day

13.2 h

8 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 Helena?

Santa Helena has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.4 °C and it receives 1,472 mm of precipitation per year.

What is the hottest day ever recorded in Santa Helena?

The hottest day measured in Santa Helena between 1940 and 2025 was 2 October 2020, reaching 41.8 °C.

What is the coldest day in Santa Helena?

The coldest day measured in Santa Helena between 1940 and 2025 was 18 July 1975, at 0.4 °C.

Does it snow in Santa Helena?

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

Has the climate of Santa Helena warmed?

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

What is the wettest day in Santa Helena?

The wettest day measured in Santa Helena between 1940 and 2025 was 3 January 1971, with 162 mm of rain in 24 hours.

What was the windiest day in Santa Helena?

The windiest day measured in Santa Helena between 1940 and 2025 was 15 September 1956, with winds reaching 57.1 km/h.

What is the warmest month in Santa Helena?

The warmest month in Santa Helena is January (26.2 °C on average); the coldest is July (17.7 °C).

How much does it rain in Santa Helena?

Santa Helena receives on average 1,472 mm of precipitation per year, spread over about 134 rainy days.

Is it sunny in Santa Helena?

Santa Helena gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.

Are there tropical nights in Santa Helena?

Yes: Santa Helena has on average 168 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Santa Helena?

In Santa Helena, between 1940 and 2025, the highest apparent temperature reached 44.1 °C on 17 November 1985, and the lowest was -4.2 °C on 18 July 1975.

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