Châtillon-sur-Seine climate — normals and trends

Q: What is the climate of Châtillon-sur-Seine?

Châtillon-sur-Seine has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 885 mm of precipitation per year.

Q: What is the hottest day ever recorded in Châtillon-sur-Seine?

The hottest day measured in Châtillon-sur-Seine between 1940 and 2025 was 25 July 2019, reaching 40.3 °C.

Q: What is the coldest day in Châtillon-sur-Seine?

The coldest day measured in Châtillon-sur-Seine between 1940 and 2025 was 6 January 1985, at -20.5 °C.

Q: Does it snow in Châtillon-sur-Seine?

Yes. Châtillon-sur-Seine gets on average 30.5 cm of snow per year and has around 54 frost days.

Q: Has the climate of Châtillon-sur-Seine warmed?

Yes: Châtillon-sur-Seine warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Châtillon-sur-Seine?

The wettest day measured in Châtillon-sur-Seine between 1940 and 2025 was 16 September 1986, with 58 mm of rain in 24 hours.

Q: What was the windiest day in Châtillon-sur-Seine?

The windiest day measured in Châtillon-sur-Seine between 1940 and 2025 was 26 December 1999, with winds reaching 56.8 km/h.

Q: What is the warmest month in Châtillon-sur-Seine?

The warmest month in Châtillon-sur-Seine is July (18.9 °C on average); the coldest is January (2.2 °C).

Q: How much does it rain in Châtillon-sur-Seine?

Châtillon-sur-Seine receives on average 885 mm of precipitation per year, spread over about 150 rainy days.

Q: Is it sunny in Châtillon-sur-Seine?

Châtillon-sur-Seine gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Châtillon-sur-Seine (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.4 °C and it receives 885 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 (18.9 °C on average) and the coldest is January (2.2 °C). Rainfall peaks in December.

Châtillon-sur-Seine averages 54 frost days, 7 hot days (≥ 30 °C) and 150 rainy days per year.

Châtillon-sur-Seine has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.

The number of frost days there went from about 64 to 44 per year over the period.

The hottest day of the period reached 40.3 °C (on 25 July 2019) and the coldest -20.5 °C (on 6 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

Châtillon-sur-SeineBourgogne

coords: 47.86°, 4.57°
period: 1940–2025 · 86 yrs

CfbTemperate oceanicWarmest monthJulyColdest monthJanuaryWettest monthDecemberDriest monthJuly

Mean daily temperature

10.4°C

Average daily high

14.2°C

Average daily low

6.8°C

Annual rainfall

885mm

Sunshine / day

8.0h

Mean relative humidity

78%

Average peak wind

16.9km/h

Seasonal range

16.7°C

Frost days (< 0 °C)

54 d/yr

Hot days (≥ 30 °C)

7 d/yr

Rainy days (≥ 1 mm)

150 d/yr

Annual snowfall

30.5 cm

Average feels-like high

12.1 °C

Average feels-like low

4.1 °C

Average peak gust

35.6 km/h

Tropical nights (≥ 20 °C)

1 d/yr

Solar radiation

11.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.39 · 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

40.3 °C

25 July 2019

Coldest day

-20.5 °C

6 January 1985

Wettest day

58 mm

16 September 1986

Windiest day

56.8 km/h

26 December 1999

Strongest gust

135.4 km/h

26 December 1999

Hottest feels-like

40.7 °C

24 July 2019

Coldest feels-like

-26.6 °C

10 February 1956

Snowiest day

16.7 cm

28 November 1947

Sunniest day

15.3 h

1 July 2011

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.5 °C13 August 2025	-7.3 °C14 January 2025	11.6 °C	856 mm	21	51
2024	35.2 °C30 July 2024	-8.1 °C16 January 2024	11.6 °C	1,192 mm	14	34
2023	32.7 °C9 July 2023	-6.5 °C3 December 2023	12.3 °C	945 mm	20	41
2022	38.0 °C19 July 2022	-7.5 °C17 December 2022	12.5 °C	775 mm	25	46
2021	31.3 °C12 August 2021	-9.9 °C11 February 2021	10.6 °C	1,006 mm	5	51
2020	36.7 °C31 July 2020	-5.4 °C22 January 2020	12.4 °C	839 mm	20	29
2019	40.3 °C25 July 2019	-4.6 °C4 February 2019	12.0 °C	798 mm	24	35
2018	37.0 °C7 August 2018	-11.5 °C28 February 2018	12.2 °C	907 mm	17	40
2017	34.3 °C22 June 2017	-8.9 °C7 January 2017	11.3 °C	826 mm	17	49
2016	34.7 °C26 August 2016	-5.2 °C30 November 2016	10.8 °C	982 mm	13	46
2015	35.7 °C1 July 2015	-4.8 °C3 February 2015	11.6 °C	766 mm	20	38
2014	34.1 °C18 July 2014	-8.4 °C29 December 2014	11.8 °C	877 mm	6	18
2013	34.7 °C27 July 2013	-6.5 °C15 March 2013	10.3 °C	1,063 mm	12	68
2012	37.1 °C19 August 2012	-13.5 °C5 February 2012	10.8 °C	977 mm	10	47
2011	36.6 °C28 June 2011	-5.5 °C30 January 2011	11.8 °C	766 mm	8	37
2010	33.9 °C9 July 2010	-13.2 °C26 December 2010	9.9 °C	925 mm	10	72
2009	34.7 °C20 August 2009	-18.5 °C19 December 2009	10.9 °C	797 mm	8	56
2008	30.6 °C1 July 2008	-5.1 °C28 November 2008	10.5 °C	929 mm	3	59
2007	32.5 °C15 July 2007	-14.8 °C26 January 2007	11.0 °C	896 mm	4	39
2006	35.1 °C19 July 2006	-6.4 °C28 January 2006	11.3 °C	857 mm	18	67
2005	33.8 °C28 July 2005	-12.6 °C1 March 2005	10.7 °C	721 mm	16	71
2004	31.8 °C2 August 2004	-6.7 °C4 January 2004	10.5 °C	759 mm	6	58
2003	38.7 °C7 August 2003	-11.0 °C13 January 2003	11.6 °C	685 mm	20	68
2002	33.6 °C17 June 2002	-6.3 °C1 January 2002	11.4 °C	922 mm	7	32
2001	32.5 °C15 August 2001	-10.4 °C24 December 2001	10.6 °C	1,050 mm	6	58
2000	31.4 °C25 August 2000	-9.1 °C26 January 2000	11.4 °C	956 mm	6	25
1999	32.6 °C25 August 1999	-9.5 °C13 February 1999	11.0 °C	1,087 mm	2	39
1998	37.3 °C11 August 1998	-9.3 °C23 November 1998	10.5 °C	852 mm	13	57
1997	31.7 °C4 August 1997	-12.4 °C1 January 1997	11.0 °C	805 mm	6	51
1996	30.9 °C7 June 1996	-11.6 °C29 December 1996	9.7 °C	840 mm	2	60
1995	34.7 °C21 July 1995	-8.3 °C5 January 1995	10.8 °C	990 mm	10	50
1994	34.3 °C4 August 1994	-7.2 °C19 January 1994	11.5 °C	1,045 mm	14	31
1993	30.5 °C21 August 1993	-12.2 °C4 January 1993	10.2 °C	843 mm	2	58
1992	33.7 °C7 August 1992	-10.6 °C23 January 1992	10.5 °C	862 mm	11	46
1991	33.5 °C11 July 1991	-12.8 °C7 February 1991	9.9 °C	703 mm	4	62
1990	33.0 °C4 August 1990	-7.4 °C18 December 1990	10.9 °C	859 mm	11	38
1989	32.3 °C21 July 1989	-6.5 °C26 November 1989	11.1 °C	731 mm	5	51
1988	31.1 °C23 July 1988	-6.8 °C3 March 1988	10.5 °C	1,114 mm	2	37
1987	31.1 °C21 August 1987	-17.2 °C16 January 1987	9.4 °C	935 mm	2	69
1986	36.6 °C3 August 1986	-14.1 °C10 February 1986	9.4 °C	1,084 mm	6	79
1985	32.0 °C25 July 1985	-20.5 °C6 January 1985	9.0 °C	713 mm	1	81
1984	32.5 °C10 July 1984	-9.4 °C5 March 1984	9.6 °C	986 mm	4	57
1983	35.2 °C31 July 1983	-6.7 °C4 December 1983	10.2 °C	1,011 mm	10	66
1982	30.9 °C9 July 1982	-7.2 °C26 February 1982	10.6 °C	957 mm	4	35
1981	30.7 °C31 July 1981	-6.4 °C15 February 1981	9.9 °C	1,243 mm	2	60
1980	31.5 °C2 August 1980	-12.5 °C9 December 1980	9.2 °C	916 mm	2	64
1979	30.2 °C29 July 1979	-12.4 °C17 January 1979	9.6 °C	1,058 mm	1	61
1978	30.6 °C29 July 1978	-6.6 °C12 February 1978	9.5 °C	985 mm	1	45
1977	28.1 °C3 July 1977	-4.4 °C31 March 1977	10.3 °C	1,141 mm	0	39
1976	34.7 °C16 July 1976	-8.4 °C30 January 1976	10.6 °C	716 mm	17	57
1975	33.4 °C4 August 1975	-6.0 °C20 December 1975	10.1 °C	876 mm	8	56
1974	34.2 °C16 August 1974	-2.3 °C31 December 1974	10.4 °C	1,030 mm	5	23
1973	31.9 °C4 September 1973	-10.5 °C3 December 1973	9.8 °C	874 mm	9	83
1972	29.2 °C8 July 1972	-8.6 °C31 January 1972	9.5 °C	1,032 mm	0	40
1971	30.7 °C12 July 1971	-13.3 °C2 January 1971	10.0 °C	749 mm	4	60
1970	30.8 °C28 July 1970	-14.3 °C16 February 1970	9.8 °C	1,047 mm	1	62
1969	31.2 °C28 July 1969	-12.0 °C9 February 1969	9.9 °C	907 mm	2	65
1968	32.5 °C1 July 1968	-16.8 °C13 January 1968	9.7 °C	1,053 mm	3	65
1967	33.0 °C18 July 1967	-14.9 °C10 January 1967	10.2 °C	875 mm	4	52
1966	31.7 °C13 August 1966	-15.1 °C18 January 1966	10.6 °C	1,008 mm	2	43
1965	30.2 °C25 June 1965	-8.3 °C4 March 1965	9.7 °C	1,104 mm	1	49
1964	36.3 °C18 July 1964	-10.8 °C29 December 1964	10.3 °C	595 mm	13	61
1963	30.5 °C22 July 1963	-13.6 °C19 January 1963	9.3 °C	837 mm	1	72
1962	32.2 °C3 September 1962	-9.6 °C24 December 1962	9.5 °C	755 mm	6	74
1961	32.4 °C30 August 1961	-7.7 °C19 December 1961	11.3 °C	837 mm	8	35
1960	29.2 °C22 August 1960	-10.9 °C14 January 1960	10.4 °C	933 mm	0	41
1959	33.6 °C9 July 1959	-7.5 °C16 January 1959	11.6 °C	695 mm	6	40
1958	29.8 °C10 August 1958	-9.5 °C25 January 1958	10.3 °C	1,220 mm	0	50
1957	33.4 °C6 July 1957	-11.1 °C21 January 1957	10.4 °C	774 mm	6	43
1956	28.8 °C9 July 1956	-18.1 °C10 February 1956	8.9 °C	853 mm	0	69
1955	31.2 °C18 July 1955	-7.0 °C18 February 1955	10.2 °C	799 mm	1	69
1954	31.1 °C3 August 1954	-13.8 °C1 February 1954	9.4 °C	830 mm	1	55
1953	30.8 °C12 August 1953	-12.3 °C17 February 1953	10.2 °C	560 mm	2	64
1952	34.9 °C1 July 1952	-9.7 °C17 February 1952	10.0 °C	968 mm	10	72
1951	28.4 °C31 July 1951	-4.5 °C6 March 1951	10.0 °C	995 mm	0	37
1950	32.0 °C30 June 1950	-11.4 °C21 December 1950	10.2 °C	907 mm	5	58
1949	31.7 °C13 July 1949	-8.7 °C6 March 1949	10.7 °C	622 mm	5	61
1948	30.0 °C27 July 1948	-10.4 °C23 February 1948	10.2 °C	919 mm	1	39
1947	34.6 °C28 July 1947	-13.5 °C28 January 1947	11.2 °C	800 mm	24	72
1946	32.9 °C5 August 1946	-11.2 °C20 December 1946	10.0 °C	659 mm	5	68
1945	32.0 °C15 July 1945	-18.7 °C17 January 1945	10.1 °C	670 mm	3	70
1944	32.4 °C23 August 1944	-10.1 °C26 February 1944	9.5 °C	837 mm	4	80
1943	32.9 °C18 August 1943	-9.5 °C5 January 1943	10.6 °C	656 mm	8	53
1942	31.4 °C5 July 1942	-19.3 °C3 February 1942	9.6 °C	648 mm	4	87
1941	32.0 °C8 July 1941	-18.5 °C6 February 1941	8.9 °C	760 mm	4	71
1940	28.3 °C5 August 1940	-18.7 °C23 January 1940	8.9 °C	880 mm	0	83

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

16.4 °C

+2.2 °C

Hot days (≥ 30 °C)

21 d/yr

+14

Frost days (< 0 °C)

51 d/yr

-3

Annual rainfall

856 mm

-30 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	6.7 °C	+2.1 °C	102 mm	+22 mm
Feb	8.0 °C	+1.6 °C	54 mm	-20 mm
Mar	13.0 °C	+2.6 °C	56 mm	-14 mm
Apr	17.4 °C	+3.5 °C	51 mm	-20 mm
May	19.8 °C	+2.0 °C	37 mm	-47 mm
Jun	26.7 °C	+5.4 °C	37 mm	-33 mm
Jul	25.1 °C	+1.5 °C	66 mm	+5 mm
Aug	26.3 °C	+3.0 °C	90 mm	+26 mm
Sep	19.3 °C	-0.6 °C	132 mm	+63 mm
Oct	15.3 °C	+0.4 °C	88 mm	+14 mm
Nov	10.5 °C	+1.7 °C	90 mm	+7 mm
Dec	7.9 °C	+2.4 °C	55 mm	-31 mm

The year's extremes

Hottest day

37.5 °C

13 Aug 2025

Coldest day

-7.3 °C

14 Jan 2025

Wettest day

24.6 mm

21 Sep 2025

Windiest day

41.1 km/h

23 Oct 2025

Strongest gust

89.6 km/h

23 Oct 2025

Hottest feels-like

39.2 °C

13 Aug 2025

Coldest feels-like

-11.5 °C

14 Jan 2025

Snowiest day

4.2 cm

13 Mar 2025

Sunniest day

15.3 h

4 Jul 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 Châtillon-sur-Seine?

Châtillon-sur-Seine has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 885 mm of precipitation per year.

What is the hottest day ever recorded in Châtillon-sur-Seine?

The hottest day measured in Châtillon-sur-Seine between 1940 and 2025 was 25 July 2019, reaching 40.3 °C.

What is the coldest day in Châtillon-sur-Seine?

The coldest day measured in Châtillon-sur-Seine between 1940 and 2025 was 6 January 1985, at -20.5 °C.

Does it snow in Châtillon-sur-Seine?

Yes. Châtillon-sur-Seine gets on average 30.5 cm of snow per year and has around 54 frost days.

Has the climate of Châtillon-sur-Seine warmed?

Yes: Châtillon-sur-Seine warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Châtillon-sur-Seine?

The wettest day measured in Châtillon-sur-Seine between 1940 and 2025 was 16 September 1986, with 58 mm of rain in 24 hours.

What was the windiest day in Châtillon-sur-Seine?

The windiest day measured in Châtillon-sur-Seine between 1940 and 2025 was 26 December 1999, with winds reaching 56.8 km/h.

What is the warmest month in Châtillon-sur-Seine?

The warmest month in Châtillon-sur-Seine is July (18.9 °C on average); the coldest is January (2.2 °C).

How much does it rain in Châtillon-sur-Seine?

Châtillon-sur-Seine receives on average 885 mm of precipitation per year, spread over about 150 rainy days.

Is it sunny in Châtillon-sur-Seine?

Châtillon-sur-Seine gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

What is the biggest single-day snowfall in Châtillon-sur-Seine?

The heaviest 24-hour snowfall measured in Châtillon-sur-Seine between 1940 and 2025 was 28 November 1947, with 16.7 cm.

Are there tropical nights in Châtillon-sur-Seine?

Yes: Châtillon-sur-Seine has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Châtillon-sur-Seine?

In Châtillon-sur-Seine, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 24 July 2019, and the lowest was -26.6 °C on 10 February 1956.

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