Romilly-sur-Seine climate — normals and trends

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

Romilly-sur-Seine has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.9 °C and it receives 712 mm of precipitation per year.

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

The hottest day measured in Romilly-sur-Seine between 1940 and 2025 was 25 July 2019, reaching 41.3 °C.

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

The coldest day measured in Romilly-sur-Seine between 1940 and 2025 was 9 January 1985, at -21.4 °C.

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

Yes. Romilly-sur-Seine gets on average 14.9 cm of snow per year and has around 49 frost days.

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

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

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

The wettest day measured in Romilly-sur-Seine between 1940 and 2025 was 16 August 2010, with 49 mm of rain in 24 hours.

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

The windiest day measured in Romilly-sur-Seine between 1940 and 2025 was 26 December 1999, with winds reaching 65.7 km/h.

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

The warmest month in Romilly-sur-Seine is July (19.3 °C on average); the coldest is January (2.9 °C).

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

Romilly-sur-Seine receives on average 712 mm of precipitation per year, spread over about 131 rainy days.

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

Romilly-sur-Seine gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.

Romilly-sur-Seine (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.9 °C and it receives 712 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 (19.3 °C on average) and the coldest is January (2.9 °C). Rainfall peaks in December.

Romilly-sur-Seine averages 49 frost days, 8 hot days (≥ 30 °C) and 131 rainy days per year.

Romilly-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 61 to 37 per year over the period.

The hottest day of the period reached 41.3 °C (on 25 July 2019) and the coldest -21.4 °C (on 9 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

Romilly-sur-SeineGrand Est

coords: 48.51°, 3.73°
period: 1940–2025 · 86 yrs

CfbTemperate oceanicWarmest monthJulyColdest monthJanuaryWettest monthDecemberDriest monthJuly

Mean daily temperature

10.9°C

Average daily high

14.8°C

Average daily low

7.2°C

Annual rainfall

712mm

Sunshine / day

7.9h

Mean relative humidity

78%

Average peak wind

18.4km/h

Seasonal range

16.4°C

Frost days (< 0 °C)

49 d/yr

Hot days (≥ 30 °C)

8 d/yr

Rainy days (≥ 1 mm)

131 d/yr

Annual snowfall

14.9 cm

Average feels-like high

12.6 °C

Average feels-like low

4.5 °C

Average peak gust

35.7 km/h

Tropical nights (≥ 20 °C)

1 d/yr

Solar radiation

11.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.38 · 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

41.3 °C

25 July 2019

Coldest day

-21.4 °C

9 January 1985

Wettest day

49 mm

16 August 2010

Windiest day

65.7 km/h

26 December 1999

Strongest gust

139.7 km/h

26 December 1999

Hottest feels-like

41.0 °C

24 July 2019

Coldest feels-like

-26.9 °C

9 January 1985

Snowiest day

14.1 cm

2 December 1997

Sunniest day

15.6 h

28 June 2019

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.5 °C2 July 2025	-7.0 °C14 January 2025	12.2 °C	711 mm	24	43
2024	35.5 °C12 August 2024	-7.1 °C20 January 2024	12.2 °C	1,018 mm	12	26
2023	34.3 °C8 September 2023	-6.7 °C9 February 2023	12.9 °C	889 mm	17	32
2022	38.7 °C19 July 2022	-7.3 °C18 December 2022	12.9 °C	739 mm	24	40
2021	33.5 °C16 June 2021	-7.4 °C11 February 2021	11.4 °C	852 mm	9	36
2020	37.9 °C9 August 2020	-4.1 °C30 November 2020	13.0 °C	710 mm	20	24
2019	41.3 °C25 July 2019	-4.5 °C21 January 2019	12.3 °C	724 mm	24	34
2018	37.9 °C7 August 2018	-10.4 °C28 February 2018	12.8 °C	700 mm	24	39
2017	34.8 °C22 June 2017	-8.0 °C7 January 2017	11.8 °C	699 mm	16	36
2016	35.7 °C25 August 2016	-6.4 °C30 November 2016	11.3 °C	809 mm	14	37
2015	36.4 °C1 July 2015	-3.7 °C5 January 2015	12.1 °C	615 mm	24	41
2014	34.8 °C18 July 2014	-7.6 °C29 December 2014	12.4 °C	746 mm	4	15
2013	35.1 °C2 August 2013	-6.2 °C15 March 2013	10.9 °C	803 mm	12	53
2012	36.3 °C19 August 2012	-12.6 °C7 February 2012	11.2 °C	799 mm	9	41
2011	36.1 °C28 June 2011	-5.2 °C1 February 2011	12.2 °C	573 mm	8	28
2010	35.4 °C2 July 2010	-8.8 °C6 January 2010	10.4 °C	768 mm	12	72
2009	35.3 °C19 August 2009	-16.1 °C19 December 2009	11.4 °C	665 mm	7	51
2008	32.4 °C31 July 2008	-6.2 °C29 December 2008	11.1 °C	737 mm	3	52
2007	33.2 °C5 August 2007	-7.4 °C20 December 2007	11.6 °C	717 mm	4	32
2006	36.5 °C26 July 2006	-7.0 °C25 January 2006	11.8 °C	662 mm	20	58
2005	34.5 °C20 June 2005	-10.8 °C1 March 2005	11.5 °C	543 mm	20	58
2004	32.3 °C2 August 2004	-7.8 °C4 January 2004	11.0 °C	610 mm	11	47
2003	39.1 °C12 August 2003	-9.9 °C10 January 2003	11.8 °C	582 mm	19	57
2002	34.5 °C29 July 2002	-7.1 °C2 January 2002	11.9 °C	792 mm	11	26
2001	33.7 °C26 June 2001	-9.2 °C24 December 2001	11.2 °C	911 mm	7	44
2000	31.8 °C19 June 2000	-8.4 °C26 January 2000	11.8 °C	873 mm	4	24
1999	33.4 °C25 August 1999	-7.2 °C13 February 1999	11.6 °C	893 mm	4	33
1998	38.2 °C11 August 1998	-9.4 °C23 November 1998	11.0 °C	695 mm	12	51
1997	33.5 °C24 August 1997	-12.9 °C1 January 1997	11.3 °C	690 mm	10	50
1996	32.1 °C7 June 1996	-11.1 °C29 December 1996	10.0 °C	642 mm	5	68
1995	36.7 °C21 July 1995	-7.7 °C5 January 1995	11.4 °C	765 mm	14	44
1994	34.6 °C4 August 1994	-6.9 °C21 February 1994	12.0 °C	764 mm	17	27
1993	31.2 °C21 August 1993	-11.2 °C4 January 1993	10.7 °C	641 mm	3	50
1992	35.2 °C8 August 1992	-8.4 °C23 January 1992	11.0 °C	652 mm	9	49
1991	33.5 °C11 July 1991	-13.9 °C9 February 1991	10.3 °C	507 mm	4	57
1990	35.5 °C4 August 1990	-6.3 °C7 December 1990	11.6 °C	637 mm	12	27
1989	33.0 °C22 July 1989	-6.9 °C27 November 1989	11.5 °C	621 mm	4	55
1988	30.5 °C14 August 1988	-6.2 °C22 November 1988	11.1 °C	797 mm	1	29
1987	30.9 °C21 August 1987	-14.8 °C12 January 1987	9.8 °C	729 mm	2	67
1986	37.2 °C3 August 1986	-12.5 °C10 February 1986	9.9 °C	799 mm	4	63
1985	31.9 °C25 July 1985	-21.4 °C9 January 1985	9.4 °C	567 mm	1	79
1984	34.3 °C30 July 1984	-6.2 °C19 February 1984	10.2 °C	799 mm	6	44
1983	35.6 °C31 July 1983	-6.2 °C15 November 1983	10.8 °C	700 mm	10	56
1982	31.4 °C13 July 1982	-6.8 °C14 January 1982	11.1 °C	750 mm	5	37
1981	30.3 °C5 August 1981	-7.4 °C20 December 1981	10.4 °C	900 mm	1	53
1980	31.6 °C2 August 1980	-9.0 °C14 January 1980	9.8 °C	742 mm	1	55
1979	30.4 °C27 July 1979	-12.3 °C1 January 1979	10.0 °C	871 mm	1	56
1978	30.3 °C29 July 1978	-10.2 °C31 December 1978	9.9 °C	815 mm	1	53
1977	28.1 °C3 July 1977	-4.8 °C20 December 1977	10.7 °C	831 mm	0	34
1976	34.3 °C1 July 1976	-9.3 °C30 January 1976	11.1 °C	537 mm	19	48
1975	35.1 °C4 August 1975	-5.8 °C19 December 1975	10.6 °C	693 mm	9	47
1974	34.4 °C16 August 1974	-3.5 °C6 March 1974	10.9 °C	840 mm	4	20
1973	33.7 °C4 September 1973	-8.6 °C3 December 1973	10.4 °C	690 mm	17	75
1972	28.7 °C18 July 1972	-10.0 °C31 January 1972	9.9 °C	876 mm	0	38
1971	30.8 °C9 July 1971	-16.3 °C6 January 1971	10.4 °C	662 mm	4	55
1970	30.5 °C28 July 1970	-11.8 °C6 January 1970	10.3 °C	815 mm	1	55
1969	31.7 °C28 July 1969	-9.4 °C18 February 1969	10.4 °C	731 mm	4	61
1968	33.4 °C1 July 1968	-16.3 °C13 January 1968	10.2 °C	768 mm	2	62
1967	32.7 °C18 July 1967	-8.9 °C7 January 1967	10.7 °C	722 mm	4	45
1966	32.3 °C13 August 1966	-11.7 °C19 January 1966	11.2 °C	746 mm	2	36
1965	28.7 °C25 June 1965	-5.2 °C22 February 1965	10.2 °C	989 mm	0	46
1964	37.3 °C18 July 1964	-10.8 °C29 December 1964	10.7 °C	525 mm	12	59
1963	31.2 °C22 July 1963	-12.1 °C19 January 1963	9.8 °C	663 mm	1	74
1962	33.2 °C3 September 1962	-8.5 °C28 December 1962	9.9 °C	621 mm	3	69
1961	33.5 °C1 September 1961	-7.4 °C25 December 1961	11.9 °C	645 mm	14	35
1960	29.0 °C22 August 1960	-10.6 °C14 January 1960	10.9 °C	811 mm	0	35
1959	33.7 °C9 July 1959	-7.7 °C16 January 1959	11.8 °C	535 mm	6	45
1958	29.3 °C10 August 1958	-14.5 °C23 January 1958	10.7 °C	1,017 mm	0	55
1957	34.2 °C6 July 1957	-5.2 °C21 January 1957	11.1 °C	711 mm	6	40
1956	29.3 °C9 July 1956	-15.8 °C2 February 1956	9.5 °C	670 mm	0	64
1955	31.1 °C18 July 1955	-6.6 °C21 February 1955	10.6 °C	619 mm	2	63
1954	32.2 °C3 August 1954	-13.6 °C1 February 1954	10.0 °C	637 mm	1	45
1953	32.7 °C12 August 1953	-7.7 °C15 January 1953	10.8 °C	427 mm	2	62
1952	36.1 °C1 July 1952	-6.9 °C28 January 1952	10.5 °C	813 mm	8	63
1951	28.7 °C31 July 1951	-4.0 °C5 March 1951	10.4 °C	824 mm	0	40
1950	30.5 °C3 July 1950	-16.2 °C30 December 1950	10.6 °C	736 mm	2	52
1949	33.6 °C13 July 1949	-7.8 °C6 March 1949	11.4 °C	492 mm	7	61
1948	31.1 °C28 July 1948	-7.4 °C21 February 1948	10.7 °C	731 mm	2	40
1947	36.2 °C28 July 1947	-11.9 °C29 January 1947	11.7 °C	626 mm	33	66
1946	34.1 °C5 August 1946	-12.2 °C22 December 1946	10.5 °C	563 mm	6	59
1945	33.1 °C14 July 1945	-16.5 °C29 January 1945	10.6 °C	536 mm	4	68
1944	34.0 °C23 August 1944	-8.3 °C28 December 1944	10.3 °C	620 mm	10	72
1943	34.3 °C18 August 1943	-4.5 °C9 January 1943	11.2 °C	563 mm	7	48
1942	32.8 °C5 July 1942	-19.6 °C22 January 1942	10.3 °C	532 mm	8	79
1941	32.1 °C8 July 1941	-13.3 °C13 January 1941	9.7 °C	606 mm	7	55
1940	30.4 °C6 September 1940	-15.7 °C23 January 1940	9.8 °C	621 mm	1	75

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

17.0 °C

+2.2 °C

Hot days (≥ 30 °C)

24 d/yr

+16

Frost days (< 0 °C)

43 d/yr

-6

Annual rainfall

711 mm

-1 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	6.9 °C	+1.5 °C	111 mm	+49 mm
Feb	7.9 °C	+0.8 °C	46 mm	-10 mm
Mar	14.1 °C	+3.1 °C	22 mm	-34 mm
Apr	18.4 °C	+3.9 °C	38 mm	-18 mm
May	20.8 °C	+2.5 °C	33 mm	-31 mm
Jun	27.0 °C	+5.3 °C	44 mm	-14 mm
Jul	25.7 °C	+1.6 °C	90 mm	+36 mm
Aug	26.4 °C	+2.5 °C	63 mm	+9 mm
Sep	20.5 °C	-0.1 °C	95 mm	+41 mm
Oct	16.0 °C	+0.5 °C	64 mm	-0 mm
Nov	11.2 °C	+1.7 °C	61 mm	-3 mm
Dec	8.6 °C	+2.3 °C	43 mm	-26 mm

The year's extremes

Hottest day

38.5 °C

2 Jul 2025

Coldest day

-7.0 °C

14 Jan 2025

Wettest day

23.2 mm

31 Aug 2025

Windiest day

45.5 km/h

6 Jan 2025

Strongest gust

86.0 km/h

6 Jan 2025

Hottest feels-like

40.4 °C

2 Jul 2025

Coldest feels-like

-10.9 °C

14 Jan 2025

Snowiest day

0.8 cm

2 Jan 2025

Sunniest day

15.6 h

3 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 Romilly-sur-Seine?

Romilly-sur-Seine has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.9 °C and it receives 712 mm of precipitation per year.

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

The hottest day measured in Romilly-sur-Seine between 1940 and 2025 was 25 July 2019, reaching 41.3 °C.

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

The coldest day measured in Romilly-sur-Seine between 1940 and 2025 was 9 January 1985, at -21.4 °C.

Does it snow in Romilly-sur-Seine?

Yes. Romilly-sur-Seine gets on average 14.9 cm of snow per year and has around 49 frost days.

Has the climate of Romilly-sur-Seine warmed?

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

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

The wettest day measured in Romilly-sur-Seine between 1940 and 2025 was 16 August 2010, with 49 mm of rain in 24 hours.

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

The windiest day measured in Romilly-sur-Seine between 1940 and 2025 was 26 December 1999, with winds reaching 65.7 km/h.

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

The warmest month in Romilly-sur-Seine is July (19.3 °C on average); the coldest is January (2.9 °C).

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

Romilly-sur-Seine receives on average 712 mm of precipitation per year, spread over about 131 rainy days.

Is it sunny in Romilly-sur-Seine?

Romilly-sur-Seine gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.

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

The heaviest 24-hour snowfall measured in Romilly-sur-Seine between 1940 and 2025 was 2 December 1997, with 14.1 cm.

Are there tropical nights in Romilly-sur-Seine?

Yes: Romilly-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 Romilly-sur-Seine?

In Romilly-sur-Seine, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 24 July 2019, and the lowest was -26.9 °C on 9 January 1985.

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