Mont-de-Marsan climate — normals and trends

Q: What is the climate of Mont-de-Marsan?

Mont-de-Marsan has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 13.8 °C and it receives 747 mm of precipitation per year.

Q: What is the hottest day ever recorded in Mont-de-Marsan?

The hottest day measured in Mont-de-Marsan between 1940 and 2025 was 18 July 2022, reaching 42.8 °C.

Q: What is the coldest day in Mont-de-Marsan?

The coldest day measured in Mont-de-Marsan between 1940 and 2025 was 8 January 1985, at -15.6 °C.

Q: Does it snow in Mont-de-Marsan?

Yes. Mont-de-Marsan gets on average 2.4 cm of snow per year and has around 25 frost days.

Q: Has the climate of Mont-de-Marsan warmed?

Yes: Mont-de-Marsan warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Mont-de-Marsan?

The wettest day measured in Mont-de-Marsan between 1940 and 2025 was 10 May 2020, with 68 mm of rain in 24 hours.

Q: What was the windiest day in Mont-de-Marsan?

The windiest day measured in Mont-de-Marsan between 1940 and 2025 was 24 January 2009, with winds reaching 52.5 km/h.

Q: What is the warmest month in Mont-de-Marsan?

The warmest month in Mont-de-Marsan is July (21.7 °C on average); the coldest is January (6.2 °C).

Q: How much does it rain in Mont-de-Marsan?

Mont-de-Marsan receives on average 747 mm of precipitation per year, spread over about 127 rainy days.

Q: Is it sunny in Mont-de-Marsan?

Mont-de-Marsan gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

Mont-de-Marsan (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 13.8 °C and it receives 747 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 July (21.7 °C on average) and the coldest is January (6.2 °C). Rainfall peaks in May.

Mont-de-Marsan averages 25 frost days, 31 hot days (≥ 30 °C) and 127 rainy days per year.

Mont-de-Marsan has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The number of frost days there went from about 31 to 19 per year over the period.

The hottest day of the period reached 42.8 °C (on 18 July 2022) and the coldest -15.6 °C (on 8 January 1985).

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

Mont-de-MarsanNew Aquitaine

coords: 43.89°, -0.50°
period: 1940–2025 · 86 yrs

CfbTemperate oceanicWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthJuly

Mean daily temperature

13.8°C

Average daily high

19.0°C

Average daily low

9.3°C

Annual rainfall

747mm

Sunshine / day

9.0h

Mean relative humidity

75%

Average peak wind

13.4km/h

Seasonal range

15.5°C

Frost days (< 0 °C)

25 d/yr

Hot days (≥ 30 °C)

31 d/yr

Rainy days (≥ 1 mm)

127 d/yr

Annual snowfall

2.4 cm

Average feels-like high

18.0 °C

Average feels-like low

7.8 °C

Average peak gust

30.9 km/h

Tropical nights (≥ 20 °C)

4 d/yr

Solar radiation

13.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.48 · 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

42.8 °C

18 July 2022

Coldest day

-15.6 °C

8 January 1985

Wettest day

68 mm

10 May 2020

Windiest day

52.5 km/h

24 January 2009

Strongest gust

138.2 km/h

24 January 2009

Hottest feels-like

45.5 °C

23 August 2023

Coldest feels-like

-20.5 °C

8 January 1985

Snowiest day

8.3 cm

3 January 1997

Sunniest day

14.8 h

23 June 2018

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	41.7 °C11 August 2025	-5.2 °C14 January 2025	14.9 °C	677 mm	54	25
2024	39.7 °C11 August 2024	-5.1 °C20 January 2024	14.4 °C	978 mm	31	8
2023	41.9 °C23 August 2023	-3.5 °C9 February 2023	15.6 °C	972 mm	57	25
2022	42.8 °C18 July 2022	-3.6 °C27 January 2022	16.2 °C	625 mm	80	22
2021	36.8 °C6 September 2021	-4.6 °C11 January 2021	14.5 °C	716 mm	39	19
2020	41.0 °C30 July 2020	-1.6 °C12 January 2020	15.3 °C	908 mm	52	4
2019	41.8 °C23 July 2019	-5.7 °C5 January 2019	14.9 °C	813 mm	59	13
2018	38.7 °C6 August 2018	-5.4 °C27 February 2018	14.9 °C	806 mm	61	19
2017	37.9 °C21 June 2017	-7.1 °C7 January 2017	14.4 °C	708 mm	40	38
2016	40.1 °C19 July 2016	-3.9 °C17 February 2016	14.6 °C	745 mm	49	8
2015	40.2 °C30 June 2015	-5.8 °C1 January 2015	15.0 °C	563 mm	53	20
2014	38.2 °C17 July 2014	-4.5 °C31 December 2014	15.2 °C	754 mm	36	7
2013	38.9 °C1 August 2013	-4.8 °C28 November 2013	13.9 °C	895 mm	48	29
2012	39.6 °C17 August 2012	-9.2 °C9 February 2012	14.2 °C	748 mm	45	34
2011	39.2 °C21 August 2011	-5.8 °C24 January 2011	15.2 °C	550 mm	36	19
2010	39.1 °C26 August 2010	-5.7 °C26 December 2010	13.6 °C	712 mm	41	45
2009	38.0 °C15 August 2009	-5.6 °C9 January 2009	14.7 °C	749 mm	44	19
2008	35.4 °C6 August 2008	-3.8 °C1 January 2008	14.0 °C	824 mm	28	12
2007	37.6 °C5 August 2007	-6.3 °C17 November 2007	14.0 °C	631 mm	21	27
2006	39.1 °C18 July 2006	-4.3 °C6 February 2006	14.8 °C	664 mm	47	37
2005	37.2 °C14 July 2005	-7.6 °C1 March 2005	13.9 °C	566 mm	43	48
2004	37.4 °C1 August 2004	-3.7 °C11 March 2004	14.1 °C	648 mm	43	29
2003	42.0 °C4 August 2003	-7.1 °C13 January 2003	15.2 °C	706 mm	69	27
2002	36.5 °C17 June 2002	-2.2 °C9 January 2002	14.6 °C	708 mm	24	5
2001	39.6 °C25 June 2001	-10.4 °C25 December 2001	14.1 °C	672 mm	34	26
2000	36.4 °C10 August 2000	-4.1 °C25 January 2000	14.4 °C	847 mm	41	23
1999	36.5 °C2 July 1999	-4.3 °C14 February 1999	14.3 °C	791 mm	31	20
1998	38.8 °C9 August 1998	-6.3 °C22 November 1998	14.0 °C	599 mm	31	26
1997	34.1 °C3 August 1997	-2.3 °C2 January 1997	15.0 °C	759 mm	29	12
1996	37.9 °C22 July 1996	-7.0 °C30 December 1996	13.9 °C	814 mm	34	19
1995	37.9 °C25 July 1995	-4.8 °C4 January 1995	14.6 °C	654 mm	41	19
1994	37.5 °C3 August 1994	-5.6 °C19 January 1994	14.7 °C	751 mm	42	10
1993	36.4 °C21 August 1993	-6.2 °C25 February 1993	13.5 °C	710 mm	24	24
1992	36.4 °C7 August 1992	-4.0 °C29 January 1992	13.5 °C	854 mm	28	30
1991	39.4 °C26 August 1991	-5.0 °C15 February 1991	13.5 °C	647 mm	41	38
1990	39.0 °C21 July 1990	-5.1 °C7 December 1990	14.6 °C	719 mm	39	26
1989	39.8 °C20 July 1989	-3.6 °C3 January 1989	14.9 °C	609 mm	44	21
1988	35.7 °C7 September 1988	-5.3 °C23 November 1988	13.9 °C	710 mm	21	21
1987	38.1 °C16 August 1987	-14.9 °C17 January 1987	13.6 °C	652 mm	29	29
1986	36.6 °C22 July 1986	-6.6 °C11 February 1986	13.5 °C	769 mm	30	14
1985	37.9 °C25 July 1985	-15.6 °C8 January 1985	13.1 °C	689 mm	33	45
1984	37.3 °C29 July 1984	-4.4 °C15 February 1984	13.2 °C	839 mm	27	27
1983	38.3 °C30 July 1983	-4.8 °C8 December 1983	13.9 °C	754 mm	24	32
1982	41.3 °C8 July 1982	-1.8 °C31 December 1982	14.3 °C	784 mm	27	7
1981	38.1 °C30 July 1981	-2.9 °C12 February 1981	13.8 °C	857 mm	23	34
1980	33.8 °C14 August 1980	-5.2 °C9 December 1980	12.7 °C	842 mm	12	33
1979	34.9 °C9 July 1979	-3.5 °C16 February 1979	13.2 °C	922 mm	13	21
1978	36.7 °C16 July 1978	-4.0 °C1 December 1978	13.3 °C	818 mm	24	15
1977	31.8 °C11 September 1977	-3.1 °C9 January 1977	13.4 °C	889 mm	4	19
1976	36.2 °C15 July 1976	-4.3 °C27 December 1976	13.4 °C	883 mm	33	30
1975	37.2 °C4 August 1975	-4.2 °C24 December 1975	13.1 °C	738 mm	18	19
1974	37.6 °C15 August 1974	-1.9 °C3 January 1974	13.3 °C	867 mm	17	10
1973	35.9 °C10 August 1973	-4.6 °C11 December 1973	13.1 °C	797 mm	29	37
1972	34.1 °C6 August 1972	-2.6 °C27 November 1972	12.8 °C	942 mm	12	10
1971	35.2 °C11 July 1971	-6.3 °C6 March 1971	13.1 °C	1,022 mm	22	28
1970	36.0 °C6 July 1970	-4.3 °C16 February 1970	13.5 °C	779 mm	26	27
1969	35.6 °C23 July 1969	-4.8 °C16 February 1969	13.1 °C	965 mm	23	31
1968	38.7 °C30 June 1968	-4.3 °C11 January 1968	13.5 °C	898 mm	15	18
1967	34.9 °C12 July 1967	-8.0 °C11 January 1967	13.5 °C	730 mm	30	27
1966	36.0 °C8 September 1966	-5.9 °C17 January 1966	13.6 °C	971 mm	13	11
1965	34.2 °C6 August 1965	-3.8 °C6 January 1965	12.8 °C	1,024 mm	11	32
1964	38.2 °C16 July 1964	-3.7 °C29 December 1964	13.2 °C	620 mm	42	41
1963	33.8 °C21 June 1963	-7.1 °C5 February 1963	12.3 °C	778 mm	12	46
1962	36.0 °C1 August 1962	-7.8 °C25 December 1962	13.0 °C	715 mm	26	34
1961	36.2 °C29 August 1961	-4.5 °C20 December 1961	14.6 °C	694 mm	30	10
1960	34.0 °C18 June 1960	-5.5 °C15 January 1960	13.5 °C	976 mm	8	18
1959	35.0 °C9 July 1959	-2.3 °C11 January 1959	14.2 °C	887 mm	15	10
1958	33.3 °C9 August 1958	-2.2 °C11 March 1958	13.7 °C	827 mm	20	10
1957	36.3 °C3 July 1957	-3.9 °C18 January 1957	13.3 °C	661 mm	14	20
1956	34.2 °C9 August 1956	-9.7 °C3 February 1956	12.3 °C	600 mm	9	43
1955	36.2 °C17 July 1955	-3.1 °C14 February 1955	14.0 °C	657 mm	22	25
1954	34.3 °C3 August 1954	-10.2 °C2 February 1954	12.7 °C	701 mm	6	25
1953	36.5 °C12 August 1953	-4.3 °C18 February 1953	12.9 °C	425 mm	19	41
1952	37.0 °C30 June 1952	-3.4 °C10 December 1952	13.5 °C	786 mm	17	36
1951	35.0 °C29 July 1951	-2.0 °C2 March 1951	13.1 °C	779 mm	13	13
1950	38.5 °C29 June 1950	-5.1 °C22 January 1950	13.8 °C	637 mm	28	24
1949	39.1 °C12 July 1949	-3.8 °C3 February 1949	13.9 °C	583 mm	48	39
1948	33.6 °C28 July 1948	-6.1 °C22 February 1948	13.4 °C	661 mm	11	11
1947	39.7 °C26 June 1947	-7.0 °C26 February 1947	14.3 °C	650 mm	55	23
1946	37.8 °C3 August 1946	-7.6 °C22 December 1946	12.9 °C	557 mm	23	42
1945	37.2 °C18 July 1945	-8.3 °C17 January 1945	14.0 °C	523 mm	48	44
1944	37.9 °C14 August 1944	-5.3 °C23 February 1944	13.0 °C	697 mm	28	47
1943	38.1 °C9 September 1943	-3.5 °C28 December 1943	14.0 °C	673 mm	40	28
1942	37.2 °C25 July 1942	-6.5 °C13 January 1942	13.3 °C	487 mm	43	55
1941	40.2 °C24 July 1941	-7.8 °C5 January 1941	12.7 °C	708 mm	25	38
1940	32.9 °C5 September 1940	-10.0 °C21 January 1940	12.8 °C	741 mm	20	46

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

20.8 °C

+1.8 °C

Hot days (≥ 30 °C)

54 d/yr

+23

Frost days (< 0 °C)

25 d/yr

Annual rainfall

677 mm

-70 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	11.8 °C	+1.6 °C	121 mm	+52 mm
Feb	15.0 °C	+2.9 °C	46 mm	-14 mm
Mar	16.2 °C	+0.7 °C	49 mm	-10 mm
Apr	20.0 °C	+1.9 °C	71 mm	+2 mm
May	23.3 °C	+1.7 °C	54 mm	-22 mm
Jun	29.9 °C	+4.7 °C	45 mm	-15 mm
Jul	28.9 °C	+1.2 °C	24 mm	-21 mm
Aug	31.4 °C	+3.8 °C	50 mm	-4 mm
Sep	24.2 °C	-0.7 °C	39 mm	-16 mm
Oct	22.0 °C	+1.9 °C	41 mm	-19 mm
Nov	15.1 °C	+1.1 °C	88 mm	+17 mm
Dec	12.1 °C	+1.4 °C	51 mm	-20 mm

The year's extremes

Hottest day

41.7 °C

11 Aug 2025

Coldest day

-5.2 °C

14 Jan 2025

Wettest day

25.7 mm

2 Jun 2025

Windiest day

35.4 km/h

23 Oct 2025

Strongest gust

79.2 km/h

23 Oct 2025

Hottest feels-like

43.3 °C

11 Aug 2025

Coldest feels-like

-8.2 °C

14 Jan 2025

Sunniest day

14.7 h

18 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 Mont-de-Marsan?

Mont-de-Marsan has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 13.8 °C and it receives 747 mm of precipitation per year.

What is the hottest day ever recorded in Mont-de-Marsan?

The hottest day measured in Mont-de-Marsan between 1940 and 2025 was 18 July 2022, reaching 42.8 °C.

What is the coldest day in Mont-de-Marsan?

The coldest day measured in Mont-de-Marsan between 1940 and 2025 was 8 January 1985, at -15.6 °C.

Does it snow in Mont-de-Marsan?

Yes. Mont-de-Marsan gets on average 2.4 cm of snow per year and has around 25 frost days.

Has the climate of Mont-de-Marsan warmed?

Yes: Mont-de-Marsan warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Mont-de-Marsan?

The wettest day measured in Mont-de-Marsan between 1940 and 2025 was 10 May 2020, with 68 mm of rain in 24 hours.

What was the windiest day in Mont-de-Marsan?

The windiest day measured in Mont-de-Marsan between 1940 and 2025 was 24 January 2009, with winds reaching 52.5 km/h.

What is the warmest month in Mont-de-Marsan?

The warmest month in Mont-de-Marsan is July (21.7 °C on average); the coldest is January (6.2 °C).

How much does it rain in Mont-de-Marsan?

Mont-de-Marsan receives on average 747 mm of precipitation per year, spread over about 127 rainy days.

Is it sunny in Mont-de-Marsan?

Mont-de-Marsan gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

What is the biggest single-day snowfall in Mont-de-Marsan?

The heaviest 24-hour snowfall measured in Mont-de-Marsan between 1940 and 2025 was 3 January 1997, with 8.3 cm.

Are there tropical nights in Mont-de-Marsan?

Yes: Mont-de-Marsan has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Mont-de-Marsan?

In Mont-de-Marsan, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 23 August 2023, and the lowest was -20.5 °C on 8 January 1985.

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