Siuna climate — normals and trends

Q: What is the climate of Siuna?

Siuna has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.4 °C and it receives 1,562 mm of precipitation per year.

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

The hottest day measured in Siuna between 1940 and 2025 was 11 May 1998, reaching 37.4 °C.

Q: What is the coldest day in Siuna?

The coldest day measured in Siuna between 1940 and 2025 was 25 December 1975, at 12.4 °C.

Q: Does it snow in Siuna?

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

Q: Has the climate of Siuna warmed?

Yes: Siuna warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Siuna?

The wettest day measured in Siuna between 1940 and 2025 was 17 November 2020, with 211 mm of rain in 24 hours.

Q: What was the windiest day in Siuna?

The windiest day measured in Siuna between 1940 and 2025 was 17 November 2020, with winds reaching 46.4 km/h.

Q: What is the warmest month in Siuna?

The warmest month in Siuna is May (26.0 °C on average); the coldest is January (22.8 °C).

Q: How much does it rain in Siuna?

Siuna receives on average 1,562 mm of precipitation per year, spread over about 264 rainy days.

Q: Is it sunny in Siuna?

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

Siuna (Nicaragua) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.4 °C and it receives 1,562 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 May (26.0 °C on average) and the coldest is January (22.8 °C). Rainfall peaks in June.

Siuna averages 0 frost days, 99 hot days (≥ 30 °C) and 264 rainy days per year.

Siuna has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.

The hottest day of the period reached 37.4 °C (on 11 May 1998) and the coldest 12.4 °C (on 25 December 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

SiunaNorth Caribbean Coast

coords: 13.73°, -84.78°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthMayColdest monthJanuaryWettest monthJuneDriest monthMarch

Mean daily temperature

24.4°C

Average daily high

28.8°C

Average daily low

21.2°C

Annual rainfall

1,562mm

Sunshine / day

9.5h

Mean relative humidity

84%

Average peak wind

11.4km/h

Seasonal range

3.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

99 d/yr

Rainy days (≥ 1 mm)

264 d/yr

Annual snowfall

0.0 cm

Average feels-like high

33.0 °C

Average feels-like low

24.4 °C

Average peak gust

34.2 km/h

Tropical nights (≥ 20 °C)

303 d/yr

Solar radiation

16.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °C per decade · r² = 0.69 · 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

37.4 °C

11 May 1998

Coldest day

12.4 °C

25 December 1975

Wettest day

211 mm

17 November 2020

Windiest day

46.4 km/h

17 November 2020

Strongest gust

130.0 km/h

17 November 2020

Hottest feels-like

43.2 °C

28 April 2010

Coldest feels-like

11.9 °C

13 January 1956

Sunniest day

12.8 h

30 May 1947

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.8 °C3 May 2025	18.7 °C10 January 2025	25.5 °C	1,773 mm	181
2024	37.4 °C27 March 2024	14.4 °C23 February 2024	26.1 °C	1,803 mm	226
2023	36.0 °C28 May 2023	14.0 °C17 January 2023	25.6 °C	1,708 mm	197
2022	34.0 °C1 May 2022	14.9 °C16 January 2022	24.9 °C	1,914 mm	138
2021	33.0 °C3 May 2021	17.4 °C13 February 2021	25.0 °C	1,375 mm	132
2020	35.0 °C21 April 2020	16.6 °C26 January 2020	25.4 °C	2,012 mm	183
2019	35.4 °C14 May 2019	15.3 °C29 January 2019	25.4 °C	1,493 mm	163
2018	34.4 °C28 April 2018	15.8 °C6 March 2018	24.9 °C	1,569 mm	118
2017	34.1 °C7 June 2017	14.8 °C25 January 2017	25.0 °C	1,777 mm	153
2016	35.3 °C2 April 2016	17.3 °C28 January 2016	25.4 °C	1,826 mm	163
2015	35.4 °C28 April 2015	17.4 °C12 February 2015	25.3 °C	1,427 mm	122
2014	34.3 °C8 April 2014	17.2 °C28 February 2014	24.9 °C	1,515 mm	124
2013	35.1 °C2 May 2013	17.4 °C8 March 2013	24.9 °C	1,572 mm	123
2012	33.4 °C5 April 2012	17.3 °C24 November 2012	24.6 °C	1,449 mm	100
2011	35.4 °C17 May 2011	15.8 °C6 January 2011	24.7 °C	1,560 mm	129
2010	37.4 °C27 April 2010	15.1 °C18 December 2010	25.0 °C	1,665 mm	153
2009	34.0 °C1 April 2009	16.3 °C22 January 2009	24.7 °C	1,544 mm	101
2008	34.1 °C12 May 2008	17.8 °C30 January 2008	24.7 °C	1,573 mm	123
2007	35.4 °C11 May 2007	17.0 °C19 February 2007	25.0 °C	1,484 mm	145
2006	34.7 °C12 May 2006	15.3 °C23 November 2006	24.9 °C	1,345 mm	140
2005	35.5 °C14 April 2005	15.4 °C22 January 2005	25.2 °C	1,735 mm	172
2004	34.6 °C10 April 2004	16.8 °C24 January 2004	24.6 °C	1,438 mm	101
2003	36.7 °C18 March 2003	17.4 °C8 December 2003	24.9 °C	1,296 mm	118
2002	33.4 °C9 May 2002	16.5 °C10 January 2002	24.8 °C	1,545 mm	122
2001	34.9 °C22 May 2001	15.5 °C8 January 2001	24.4 °C	1,261 mm	103
2000	33.8 °C22 April 2000	14.1 °C27 January 2000	24.1 °C	1,192 mm	83
1999	34.9 °C2 May 1999	14.8 °C28 December 1999	24.2 °C	1,406 mm	75
1998	37.4 °C11 May 1998	15.0 °C10 February 1998	25.0 °C	1,582 mm	141
1997	35.5 °C24 April 1997	15.6 °C16 December 1997	24.5 °C	1,297 mm	85
1996	34.2 °C27 April 1996	14.6 °C14 January 1996	24.3 °C	1,689 mm	109
1995	34.9 °C24 April 1995	17.0 °C12 February 1995	24.8 °C	1,372 mm	166
1994	34.3 °C19 May 1994	13.9 °C5 March 1994	24.4 °C	1,219 mm	93
1993	33.9 °C16 April 1993	14.8 °C28 January 1993	24.4 °C	1,804 mm	88
1992	35.0 °C17 May 1992	15.3 °C8 January 1992	24.5 °C	1,191 mm	109
1991	34.1 °C23 April 1991	14.8 °C6 March 1991	24.4 °C	1,317 mm	95
1990	33.1 °C28 May 1990	17.1 °C4 March 1990	24.3 °C	1,631 mm	72
1989	32.5 °C15 May 1989	15.4 °C25 December 1989	24.1 °C	1,461 mm	66
1988	36.5 °C17 May 1988	15.7 °C28 February 1988	24.7 °C	1,471 mm	124
1987	37.1 °C24 March 1987	14.3 °C6 January 1987	25.0 °C	1,269 mm	155
1986	35.5 °C3 June 1986	14.0 °C4 March 1986	24.0 °C	1,694 mm	67
1985	33.4 °C18 May 1985	15.7 °C13 January 1985	24.0 °C	1,447 mm	82
1984	36.4 °C12 April 1984	14.6 °C8 January 1984	24.1 °C	1,321 mm	93
1983	36.3 °C17 March 1983	15.9 °C3 March 1983	24.8 °C	1,410 mm	131
1982	34.1 °C11 April 1982	16.2 °C23 March 1982	24.3 °C	1,610 mm	75
1981	34.5 °C19 March 1981	14.6 °C15 January 1981	24.2 °C	1,555 mm	87
1980	34.6 °C2 May 1980	13.3 °C29 December 1980	24.4 °C	1,559 mm	86
1979	34.5 °C25 March 1979	16.4 °C28 January 1979	24.5 °C	1,632 mm	90
1978	35.8 °C4 May 1978	15.4 °C16 January 1978	24.5 °C	1,529 mm	94
1977	35.4 °C11 May 1977	14.8 °C20 January 1977	24.4 °C	1,403 mm	75
1976	35.3 °C8 April 1976	14.4 °C11 February 1976	24.0 °C	1,640 mm	57
1975	35.0 °C23 May 1975	12.4 °C25 December 1975	24.2 °C	1,670 mm	95
1974	34.0 °C6 May 1974	15.9 °C2 February 1974	23.9 °C	1,386 mm	60
1973	35.0 °C27 April 1973	14.5 °C13 February 1973	24.3 °C	1,571 mm	104
1972	34.3 °C30 March 1972	16.3 °C30 December 1972	24.4 °C	1,715 mm	73
1971	33.7 °C24 April 1971	14.8 °C22 January 1971	24.0 °C	1,622 mm	66
1970	33.3 °C8 May 1970	15.4 °C11 January 1970	24.2 °C	1,675 mm	82
1969	36.6 °C6 May 1969	17.0 °C10 January 1969	24.8 °C	1,713 mm	129
1968	33.9 °C7 June 1968	14.7 °C11 February 1968	24.1 °C	1,535 mm	92
1967	33.4 °C15 June 1967	17.2 °C8 February 1967	24.4 °C	1,432 mm	79
1966	35.4 °C10 April 1966	15.7 °C21 December 1966	24.6 °C	1,748 mm	85
1965	33.7 °C13 May 1965	15.2 °C30 January 1965	24.4 °C	1,391 mm	93
1964	37.0 °C5 May 1964	17.5 °C28 February 1964	24.6 °C	1,412 mm	110
1963	34.1 °C7 April 1963	15.0 °C7 February 1963	24.2 °C	1,672 mm	73
1962	33.6 °C24 March 1962	15.3 °C15 February 1962	24.0 °C	1,563 mm	62
1961	34.4 °C1 April 1961	16.4 °C4 February 1961	24.1 °C	1,471 mm	56
1960	32.9 °C2 April 1960	15.6 °C2 February 1960	24.0 °C	1,654 mm	90
1959	32.2 °C19 April 1959	16.3 °C19 February 1959	23.8 °C	1,260 mm	48
1958	34.8 °C21 April 1958	15.7 °C9 January 1958	24.5 °C	1,768 mm	117
1957	34.9 °C4 May 1957	15.2 °C11 December 1957	24.1 °C	1,612 mm	78
1956	34.4 °C11 April 1956	12.8 °C13 January 1956	23.6 °C	1,710 mm	49
1955	37.2 °C27 April 1955	16.9 °C13 January 1955	24.3 °C	1,437 mm	106
1954	32.3 °C14 March 1954	15.3 °C11 February 1954	24.1 °C	1,585 mm	52
1953	34.9 °C13 April 1953	16.2 °C12 January 1953	24.5 °C	1,512 mm	89
1952	33.0 °C4 May 1952	14.9 °C29 February 1952	24.2 °C	1,695 mm	93
1951	35.3 °C8 April 1951	14.9 °C11 January 1951	24.3 °C	1,601 mm	96
1950	33.7 °C26 April 1950	13.7 °C13 December 1950	23.5 °C	1,725 mm	56
1949	34.3 °C6 April 1949	16.6 °C28 February 1949	23.6 °C	1,620 mm	53
1948	31.8 °C1 April 1948	17.0 °C23 January 1948	23.4 °C	2,004 mm	30
1947	33.3 °C12 May 1947	14.6 °C16 February 1947	23.8 °C	1,428 mm	77
1946	32.0 °C26 April 1946	14.5 °C23 March 1946	23.4 °C	1,749 mm	45
1945	33.4 °C17 May 1945	13.1 °C6 December 1945	23.3 °C	1,876 mm	47
1944	33.3 °C24 May 1944	15.2 °C3 April 1944	23.5 °C	1,418 mm	53
1943	31.7 °C26 April 1943	15.3 °C20 December 1943	23.2 °C	1,732 mm	20
1942	32.3 °C25 April 1942	15.4 °C26 January 1942	23.3 °C	1,987 mm	37
1941	35.5 °C8 April 1941	14.3 °C15 January 1941	23.6 °C	1,634 mm	66
1940	33.7 °C24 May 1940	16.3 °C5 February 1940	23.8 °C	1,384 mm	62

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

29.8 °C

+1.0 °C

Hot days (≥ 30 °C)

181 d/yr

+82

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1773 mm

+211 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.3 °C	+1.6 °C	121 mm	+69 mm
Feb	29.1 °C	+1.4 °C	76 mm	+40 mm
Mar	30.7 °C	+1.2 °C	38 mm	+5 mm
Apr	30.9 °C	-0.2 °C	52 mm	+6 mm
May	32.4 °C	+1.5 °C	79 mm	-77 mm
Jun	28.8 °C	-0.3 °C	351 mm	+110 mm
Jul	29.8 °C	+1.4 °C	188 mm	-32 mm
Aug	29.8 °C	+0.9 °C	162 mm	-28 mm
Sep	30.4 °C	+1.2 °C	186 mm	-15 mm
Oct	30.8 °C	+2.0 °C	235 mm	+31 mm
Nov	28.6 °C	+0.8 °C	192 mm	+75 mm
Dec	28.0 °C	+1.1 °C	93 mm	+27 mm

The year's extremes

Hottest day

34.8 °C

3 May 2025

Coldest day

18.7 °C

10 Jan 2025

Wettest day

35.8 mm

26 Jun 2025

Windiest day

20.4 km/h

31 Oct 2025

Strongest gust

54.0 km/h

28 May 2025

Hottest feels-like

40.5 °C

3 May 2025

Coldest feels-like

20.1 °C

10 Jan 2025

Sunniest day

12.7 h

29 May 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 Siuna?

Siuna has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.4 °C and it receives 1,562 mm of precipitation per year.

What is the hottest day ever recorded in Siuna?

The hottest day measured in Siuna between 1940 and 2025 was 11 May 1998, reaching 37.4 °C.

What is the coldest day in Siuna?

The coldest day measured in Siuna between 1940 and 2025 was 25 December 1975, at 12.4 °C.

Does it snow in Siuna?

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

Has the climate of Siuna warmed?

Yes: Siuna warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Siuna?

The wettest day measured in Siuna between 1940 and 2025 was 17 November 2020, with 211 mm of rain in 24 hours.

What was the windiest day in Siuna?

The windiest day measured in Siuna between 1940 and 2025 was 17 November 2020, with winds reaching 46.4 km/h.

What is the warmest month in Siuna?

The warmest month in Siuna is May (26.0 °C on average); the coldest is January (22.8 °C).

How much does it rain in Siuna?

Siuna receives on average 1,562 mm of precipitation per year, spread over about 264 rainy days.

Is it sunny in Siuna?

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

Are there tropical nights in Siuna?

Yes: Siuna has on average 303 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Siuna?

In Siuna, between 1940 and 2025, the highest apparent temperature reached 43.2 °C on 28 April 2010, and the lowest was 11.9 °C on 13 January 1956.

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