Saint-Laurent-du-Maroni climate — normals and trends

Q: What is the climate of Saint-Laurent-du-Maroni?

Saint-Laurent-du-Maroni has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.6 °C and it receives 2,430 mm of precipitation per year.

Q: What is the hottest day ever recorded in Saint-Laurent-du-Maroni?

The hottest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 1 October 2023, reaching 34.9 °C.

Q: What is the coldest day in Saint-Laurent-du-Maroni?

The coldest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 26 January 1955, at 17.2 °C.

Q: Does it snow in Saint-Laurent-du-Maroni?

Almost never: Saint-Laurent-du-Maroni sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Saint-Laurent-du-Maroni warmed?

Yes: Saint-Laurent-du-Maroni warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Saint-Laurent-du-Maroni?

The wettest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 13 April 1970, with 314 mm of rain in 24 hours.

Q: What was the windiest day in Saint-Laurent-du-Maroni?

The windiest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 9 March 1977, with winds reaching 22.5 km/h.

Q: What is the warmest month in Saint-Laurent-du-Maroni?

The warmest month in Saint-Laurent-du-Maroni is October (26.5 °C on average); the coldest is January (24.9 °C).

Q: How much does it rain in Saint-Laurent-du-Maroni?

Saint-Laurent-du-Maroni receives on average 2,430 mm of precipitation per year, spread over about 276 rainy days.

Q: Is it sunny in Saint-Laurent-du-Maroni?

Saint-Laurent-du-Maroni gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Saint-Laurent-du-Maroni (French Guiana) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.6 °C and it receives 2,430 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 (26.5 °C on average) and the coldest is January (24.9 °C). Rainfall peaks in June.

Saint-Laurent-du-Maroni averages 0 frost days, 133 hot days (≥ 30 °C) and 276 rainy days per year.

Saint-Laurent-du-Maroni 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 34.9 °C (on 1 October 2023) and the coldest 17.2 °C (on 26 January 1955).

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

Saint-Laurent-du-MaroniGuyane

coords: 5.50°, -54.03°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthOctoberColdest monthJanuaryWettest monthJuneDriest monthSeptember

Mean daily temperature

25.6°C

Average daily high

29.5°C

Average daily low

23.0°C

Annual rainfall

2,430mm

Sunshine / day

10.2h

Mean relative humidity

87%

Average peak wind

12.6km/h

Seasonal range

1.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

133 d/yr

Rainy days (≥ 1 mm)

276 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.7 °C

Average feels-like low

27.1 °C

Average peak gust

32.1 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

18.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °C per decade · r² = 0.78 · 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

34.9 °C

1 October 2023

Coldest day

17.2 °C

26 January 1955

Wettest day

314 mm

13 April 1970

Windiest day

22.5 km/h

9 March 1977

Strongest gust

54.7 km/h

15 April 1979

Hottest feels-like

42.7 °C

31 August 2024

Coldest feels-like

19.3 °C

26 January 1955

Sunniest day

12.2 h

21 May 2009

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.5 °C12 September 2025	22.0 °C25 October 2025	26.6 °C	3,105 mm	249
2024	34.9 °C24 September 2024	21.7 °C1 January 2024	27.2 °C	2,215 mm	305
2023	34.9 °C1 October 2023	20.7 °C27 January 2023	26.7 °C	2,944 mm	244
2022	33.4 °C12 August 2022	21.5 °C23 February 2022	26.1 °C	3,903 mm	187
2021	33.9 °C14 October 2021	22.3 °C17 February 2021	26.2 °C	3,482 mm	209
2020	33.7 °C7 September 2020	21.3 °C23 January 2020	26.5 °C	2,695 mm	235
2019	34.5 °C16 September 2019	21.8 °C28 February 2019	26.4 °C	2,068 mm	189
2018	34.6 °C28 August 2018	21.1 °C29 December 2018	26.0 °C	2,575 mm	168
2017	34.7 °C4 September 2017	22.1 °C4 January 2017	26.3 °C	2,479 mm	203
2016	34.2 °C27 September 2016	20.9 °C22 January 2016	26.4 °C	2,601 mm	232
2015	33.5 °C22 October 2015	20.6 °C6 February 2015	26.1 °C	2,211 mm	189
2014	33.6 °C30 October 2014	20.9 °C28 August 2014	26.1 °C	2,023 mm	187
2013	33.0 °C8 July 2013	21.4 °C12 January 2013	26.0 °C	2,451 mm	192
2012	33.9 °C16 September 2012	21.6 °C17 February 2012	26.1 °C	2,249 mm	216
2011	34.2 °C20 August 2011	20.7 °C11 January 2011	26.1 °C	2,147 mm	213
2010	33.6 °C1 November 2010	21.8 °C11 February 2010	26.5 °C	2,354 mm	234
2009	33.3 °C16 August 2009	21.1 °C22 June 2009	26.2 °C	1,687 mm	208
2008	33.5 °C8 October 2008	21.3 °C18 March 2008	26.0 °C	2,130 mm	179
2007	32.4 °C27 May 2007	20.7 °C7 January 2007	25.9 °C	2,464 mm	182
2006	33.2 °C5 September 2006	21.7 °C20 July 2006	26.0 °C	2,475 mm	187
2005	33.1 °C15 October 2005	21.6 °C25 March 2005	26.3 °C	2,144 mm	229
2004	33.0 °C28 August 2004	20.8 °C25 January 2004	26.0 °C	1,983 mm	185
2003	33.6 °C19 September 2003	21.4 °C13 August 2003	26.1 °C	1,743 mm	178
2002	32.7 °C26 September 2002	21.4 °C9 January 2002	25.8 °C	2,388 mm	131
2001	32.8 °C6 October 2001	20.9 °C2 February 2001	25.8 °C	1,776 mm	153
2000	32.9 °C21 September 2000	21.0 °C7 July 2000	25.5 °C	2,541 mm	120
1999	32.6 °C14 November 1999	21.1 °C21 March 1999	25.8 °C	2,255 mm	154
1998	32.9 °C21 August 1998	21.9 °C24 December 1998	26.4 °C	1,894 mm	207
1997	34.0 °C15 October 1997	21.4 °C11 September 1997	25.9 °C	2,168 mm	152
1996	32.8 °C5 September 1996	21.3 °C16 August 1996	25.8 °C	2,437 mm	145
1995	33.0 °C19 October 1995	21.1 °C2 January 1995	26.0 °C	1,981 mm	173
1994	32.3 °C31 October 1994	21.3 °C27 December 1994	25.6 °C	2,032 mm	114
1993	32.0 °C9 July 1993	21.1 °C4 August 1993	25.6 °C	2,265 mm	126
1992	32.4 °C1 October 1992	20.7 °C24 January 1992	25.6 °C	1,668 mm	125
1991	31.7 °C5 November 1991	20.8 °C30 October 1991	25.6 °C	1,848 mm	111
1990	33.5 °C23 September 1990	20.6 °C23 February 1990	25.7 °C	2,458 mm	153
1989	33.8 °C29 September 1989	20.5 °C26 December 1989	25.6 °C	2,223 mm	123
1988	32.7 °C23 September 1988	20.7 °C18 December 1988	25.8 °C	2,083 mm	172
1987	33.5 °C12 October 1987	21.5 °C5 March 1987	26.2 °C	1,716 mm	204
1986	32.7 °C21 September 1986	20.1 °C3 March 1986	25.6 °C	2,200 mm	121
1985	32.3 °C13 July 1985	19.1 °C4 February 1985	25.3 °C	2,081 mm	100
1984	31.9 °C29 August 1984	20.3 °C13 February 1984	25.3 °C	2,602 mm	85
1983	32.7 °C27 September 1983	19.8 °C9 February 1983	25.8 °C	2,252 mm	160
1982	32.2 °C22 October 1982	20.1 °C22 October 1982	25.4 °C	2,344 mm	104
1981	32.6 °C17 August 1981	20.9 °C16 March 1981	25.6 °C	2,765 mm	163
1980	32.5 °C5 September 1980	20.3 °C28 February 1980	25.6 °C	2,514 mm	118
1979	33.7 °C22 October 1979	19.8 °C17 January 1979	25.6 °C	2,631 mm	162
1978	31.8 °C31 August 1978	20.5 °C24 December 1978	25.4 °C	2,211 mm	103
1977	32.1 °C7 August 1977	20.9 °C4 February 1977	25.3 °C	2,153 mm	105
1976	33.4 °C31 October 1976	19.6 °C13 February 1976	25.1 °C	2,342 mm	105
1975	32.7 °C26 October 1975	20.4 °C23 January 1975	25.1 °C	2,521 mm	84
1974	32.6 °C30 September 1974	20.4 °C18 January 1974	25.1 °C	2,196 mm	84
1973	32.2 °C30 September 1973	20.7 °C12 January 1973	25.4 °C	2,456 mm	106
1972	33.1 °C6 October 1972	20.4 °C19 January 1972	25.2 °C	2,613 mm	91
1971	32.6 °C9 September 1971	19.4 °C3 May 1971	24.8 °C	2,724 mm	55
1970	32.3 °C3 September 1970	21.5 °C29 January 1970	25.5 °C	3,799 mm	115
1969	32.6 °C22 September 1969	21.6 °C7 January 1969	25.6 °C	3,452 mm	139
1968	31.9 °C18 September 1968	20.2 °C6 July 1968	25.2 °C	2,683 mm	72
1967	32.5 °C2 October 1967	19.7 °C10 February 1967	25.2 °C	2,396 mm	97
1966	33.5 °C25 October 1966	20.9 °C13 January 1966	25.7 °C	1,382 mm	122
1965	31.9 °C28 October 1965	20.1 °C24 March 1965	25.1 °C	1,640 mm	46
1964	31.3 °C9 October 1964	20.1 °C12 January 1964	25.2 °C	1,777 mm	44
1963	31.6 °C9 November 1963	20.4 °C13 January 1963	25.1 °C	2,744 mm	61
1962	30.7 °C7 October 1962	20.8 °C10 January 1962	25.0 °C	2,598 mm	31
1961	30.7 °C28 April 1961	19.3 °C13 February 1961	25.0 °C	2,690 mm	16
1960	31.9 °C30 October 1960	20.8 °C4 March 1960	24.9 °C	2,644 mm	52
1959	32.2 °C9 October 1959	20.6 °C20 July 1959	24.9 °C	2,358 mm	49
1958	31.9 °C27 September 1958	21.0 °C26 June 1958	25.6 °C	1,858 mm	157
1957	32.9 °C1 October 1957	20.3 °C11 January 1957	25.3 °C	2,087 mm	123
1956	31.8 °C26 September 1956	20.9 °C12 July 1956	24.7 °C	3,172 mm	64
1955	33.3 °C22 October 1955	17.2 °C26 January 1955	25.0 °C	2,868 mm	106
1954	32.2 °C27 July 1954	21.1 °C3 February 1954	24.8 °C	3,405 mm	70
1953	32.6 °C11 October 1953	20.9 °C5 March 1953	25.3 °C	2,903 mm	118
1952	32.3 °C30 September 1952	20.5 °C2 March 1952	25.3 °C	2,034 mm	107
1951	32.6 °C7 November 1951	20.6 °C15 December 1951	25.3 °C	2,875 mm	128
1950	34.7 °C20 October 1950	20.5 °C26 March 1950	25.0 °C	2,539 mm	73
1949	31.3 °C13 October 1949	20.3 °C29 June 1949	24.6 °C	3,190 mm	13
1948	31.8 °C21 October 1948	20.6 °C7 February 1948	24.9 °C	3,097 mm	51
1947	32.4 °C5 September 1947	20.2 °C17 February 1947	25.2 °C	2,041 mm	86
1946	31.8 °C30 October 1946	20.7 °C4 August 1946	24.8 °C	3,090 mm	52
1945	34.0 °C25 October 1945	20.4 °C8 January 1945	25.2 °C	2,503 mm	118
1944	33.0 °C13 November 1944	20.4 °C24 January 1944	25.3 °C	2,154 mm	120
1943	33.2 °C4 October 1943	20.5 °C28 April 1943	24.5 °C	3,290 mm	78
1942	31.8 °C18 October 1942	20.1 °C7 January 1942	24.7 °C	2,957 mm	64
1941	33.3 °C4 October 1941	20.8 °C8 January 1941	25.2 °C	2,390 mm	84
1940	33.1 °C5 November 1940	20.7 °C6 January 1940	25.2 °C	1,906 mm	100

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

30.6 °C

+1.1 °C

Hot days (≥ 30 °C)

249 d/yr

+116

Frost days (< 0 °C)

0 d/yr

Annual rainfall

3105 mm

+675 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.5 °C	+1.2 °C	289 mm	+97 mm
Feb	29.5 °C	+1.2 °C	184 mm	+44 mm
Mar	29.6 °C	+0.9 °C	145 mm	+6 mm
Apr	30.1 °C	+1.1 °C	251 mm	+40 mm
May	29.9 °C	+0.9 °C	667 mm	+328 mm
Jun	30.2 °C	+1.2 °C	534 mm	+181 mm
Jul	30.9 °C	+1.3 °C	300 mm	+19 mm
Aug	31.4 °C	+1.0 °C	212 mm	+40 mm
Sep	32.4 °C	+1.4 °C	77 mm	-24 mm
Oct	32.0 °C	+0.9 °C	104 mm	-7 mm
Nov	31.3 °C	+1.1 °C	137 mm	-38 mm
Dec	30.2 °C	+1.2 °C	205 mm	-12 mm

The year's extremes

Hottest day

33.5 °C

12 Sep 2025

Coldest day

22.0 °C

25 Oct 2025

Wettest day

93.7 mm

23 Jan 2025

Windiest day

20.1 km/h

21 Feb 2025

Strongest gust

47.5 km/h

25 Mar 2025

Hottest feels-like

41.5 °C

8 Sep 2025

Coldest feels-like

25.5 °C

1 Mar 2025

Sunniest day

12.0 h

29 Jun 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 Saint-Laurent-du-Maroni?

Saint-Laurent-du-Maroni has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.6 °C and it receives 2,430 mm of precipitation per year.

What is the hottest day ever recorded in Saint-Laurent-du-Maroni?

The hottest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 1 October 2023, reaching 34.9 °C.

What is the coldest day in Saint-Laurent-du-Maroni?

The coldest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 26 January 1955, at 17.2 °C.

Does it snow in Saint-Laurent-du-Maroni?

Almost never: Saint-Laurent-du-Maroni sees virtually no snow, with about 0 frost days per year.

Has the climate of Saint-Laurent-du-Maroni warmed?

Yes: Saint-Laurent-du-Maroni warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Saint-Laurent-du-Maroni?

The wettest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 13 April 1970, with 314 mm of rain in 24 hours.

What was the windiest day in Saint-Laurent-du-Maroni?

The windiest day measured in Saint-Laurent-du-Maroni between 1940 and 2025 was 9 March 1977, with winds reaching 22.5 km/h.

What is the warmest month in Saint-Laurent-du-Maroni?

The warmest month in Saint-Laurent-du-Maroni is October (26.5 °C on average); the coldest is January (24.9 °C).

How much does it rain in Saint-Laurent-du-Maroni?

Saint-Laurent-du-Maroni receives on average 2,430 mm of precipitation per year, spread over about 276 rainy days.

Is it sunny in Saint-Laurent-du-Maroni?

Saint-Laurent-du-Maroni gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Are there tropical nights in Saint-Laurent-du-Maroni?

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

What was the most extreme apparent temperature in Saint-Laurent-du-Maroni?

In Saint-Laurent-du-Maroni, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 31 August 2024, and the lowest was 19.3 °C on 26 January 1955.

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