Marco Simone climate — normals and trends

Q: What is the climate of Marco Simone?

Marco Simone has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.0 °C and it receives 944 mm of precipitation per year.

Q: What is the hottest day ever recorded in Marco Simone?

The hottest day measured in Marco Simone between 1940 and 2025 was 2 August 2017, reaching 39.4 °C.

Q: What is the coldest day in Marco Simone?

The coldest day measured in Marco Simone between 1940 and 2025 was 23 January 1945, at -18.1 °C.

Q: Does it snow in Marco Simone?

Yes. Marco Simone gets on average 8.9 cm of snow per year and has around 32 frost days.

Q: Has the climate of Marco Simone warmed?

Yes: Marco Simone warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Marco Simone?

The wettest day measured in Marco Simone between 1940 and 2025 was 3 September 1959, with 88 mm of rain in 24 hours.

Q: What was the windiest day in Marco Simone?

The windiest day measured in Marco Simone between 1940 and 2025 was 29 October 2018, with winds reaching 38.7 km/h.

Q: What is the warmest month in Marco Simone?

The warmest month in Marco Simone is July (23.6 °C on average); the coldest is January (5.3 °C).

Q: How much does it rain in Marco Simone?

Marco Simone receives on average 944 mm of precipitation per year, spread over about 116 rainy days.

Q: Is it sunny in Marco Simone?

Marco Simone gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Marco Simone (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.0 °C and it receives 944 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 (23.6 °C on average) and the coldest is January (5.3 °C). Rainfall peaks in November.

Marco Simone averages 32 frost days, 35 hot days (≥ 30 °C) and 116 rainy days per year.

Marco Simone has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.

The number of frost days there went from about 45 to 19 per year over the period.

The hottest day of the period reached 39.4 °C (on 2 August 2017) and the coldest -18.1 °C (on 23 January 1945).

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

Marco SimoneLazio

coords: 41.96°, 12.65°
period: 1940–2025 · 86 yrs

CsaHot-summer MediterraneanWarmest monthJulyColdest monthJanuaryWettest monthNovemberDriest monthJuly

Mean daily temperature

14.0°C

Average daily high

19.1°C

Average daily low

9.3°C

Annual rainfall

944mm

Sunshine / day

9.9h

Mean relative humidity

73%

Average peak wind

11.7km/h

Seasonal range

18.3°C

Frost days (< 0 °C)

32 d/yr

Hot days (≥ 30 °C)

35 d/yr

Rainy days (≥ 1 mm)

116 d/yr

Annual snowfall

8.9 cm

Average feels-like high

18.5 °C

Average feels-like low

7.9 °C

Average peak gust

30.0 km/h

Tropical nights (≥ 20 °C)

11 d/yr

Solar radiation

15.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °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

39.4 °C

2 August 2017

Coldest day

-18.1 °C

23 January 1945

Wettest day

88 mm

3 September 1959

Windiest day

38.7 km/h

29 October 2018

Strongest gust

113.0 km/h

29 October 2018

Hottest feels-like

41.3 °C

3 August 2017

Coldest feels-like

-23.1 °C

23 January 1945

Snowiest day

25.0 cm

11 March 1956

Sunniest day

14.3 h

9 July 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.1 °C11 August 2025	-1.0 °C15 January 2025	16.1 °C	880 mm	62	1
2024	37.7 °C29 July 2024	-2.2 °C22 December 2024	16.4 °C	993 mm	77	3
2023	39.0 °C18 July 2023	-2.9 °C8 February 2023	15.9 °C	1,025 mm	60	14
2022	38.9 °C27 June 2022	-1.7 °C14 January 2022	16.2 °C	712 mm	88	17
2021	38.2 °C12 August 2021	-3.2 °C27 January 2021	15.1 °C	939 mm	54	25
2020	37.9 °C31 July 2020	-2.1 °C7 February 2020	15.1 °C	987 mm	61	11
2019	37.3 °C12 August 2019	-4.1 °C5 January 2019	15.3 °C	1,147 mm	68	15
2018	35.0 °C31 July 2018	-16.6 °C28 February 2018	15.3 °C	1,248 mm	41	16
2017	39.4 °C2 August 2017	-6.1 °C7 January 2017	15.1 °C	738 mm	66	26
2016	33.9 °C24 June 2016	-2.7 °C20 January 2016	15.1 °C	950 mm	50	16
2015	36.4 °C20 July 2015	-2.3 °C1 January 2015	15.3 °C	839 mm	60	13
2014	32.6 °C11 June 2014	-2.3 °C31 December 2014	15.1 °C	1,115 mm	21	11
2013	37.3 °C5 August 2013	-4.1 °C19 January 2013	14.6 °C	1,097 mm	47	28
2012	37.2 °C7 August 2012	-12.2 °C15 February 2012	15.0 °C	940 mm	72	40
2011	36.4 °C21 August 2011	-6.0 °C8 March 2011	14.7 °C	738 mm	45	26
2010	36.1 °C16 July 2010	-11.0 °C17 December 2010	14.3 °C	1,284 mm	45	30
2009	36.2 °C24 July 2009	-4.7 °C21 December 2009	14.8 °C	948 mm	56	25
2008	34.5 °C6 September 2008	-5.3 °C18 February 2008	14.6 °C	1,155 mm	63	19
2007	38.3 °C25 August 2007	-8.7 °C28 January 2007	14.6 °C	705 mm	42	22
2006	34.8 °C21 July 2006	-4.2 °C25 January 2006	14.2 °C	608 mm	49	37
2005	38.0 °C29 July 2005	-5.0 °C2 March 2005	13.7 °C	1,039 mm	32	57
2004	36.4 °C23 July 2004	-9.6 °C31 January 2004	14.3 °C	1,070 mm	39	25
2003	37.1 °C6 August 2003	-3.9 °C8 February 2003	15.0 °C	756 mm	71	39
2002	34.7 °C22 June 2002	-4.6 °C2 January 2002	14.4 °C	963 mm	27	21
2001	34.5 °C3 August 2001	-5.6 °C19 December 2001	14.6 °C	678 mm	38	23
2000	34.6 °C23 August 2000	-4.5 °C27 January 2000	14.7 °C	859 mm	32	25
1999	36.1 °C10 August 1999	-7.3 °C13 February 1999	14.4 °C	1,028 mm	28	34
1998	36.4 °C3 August 1998	-4.0 °C9 December 1998	14.4 °C	876 mm	46	20
1997	32.1 °C23 July 1997	-1.3 °C9 February 1997	14.6 °C	805 mm	29	12
1996	32.4 °C27 July 1996	-4.9 °C6 March 1996	13.7 °C	1,155 mm	19	30
1995	33.9 °C27 July 1995	-3.2 °C6 January 1995	13.7 °C	884 mm	28	31
1994	35.3 °C5 August 1994	-2.3 °C25 December 1994	14.7 °C	679 mm	50	13
1993	36.3 °C5 August 1993	-11.2 °C24 February 1993	13.8 °C	784 mm	38	53
1992	34.1 °C7 August 1992	-3.5 °C2 January 1992	14.0 °C	924 mm	30	24
1991	32.8 °C6 July 1991	-5.0 °C7 February 1991	13.2 °C	925 mm	41	46
1990	32.9 °C23 July 1990	-2.9 °C16 January 1990	14.0 °C	795 mm	17	37
1989	34.1 °C18 August 1989	-4.0 °C4 December 1989	13.7 °C	785 mm	25	43
1988	34.7 °C5 July 1988	-7.4 °C18 December 1988	14.0 °C	739 mm	40	39
1987	35.8 °C24 July 1987	-7.1 °C9 January 1987	14.0 °C	879 mm	39	34
1986	33.0 °C19 September 1986	-5.6 °C14 February 1986	13.7 °C	1,072 mm	18	41
1985	34.4 °C16 August 1985	-17.0 °C7 January 1985	13.9 °C	792 mm	35	37
1984	31.9 °C12 July 1984	-4.6 °C26 January 1984	12.9 °C	1,167 mm	8	34
1983	35.6 °C27 July 1983	-4.2 °C24 February 1983	13.6 °C	798 mm	21	40
1982	35.2 °C25 June 1982	-3.4 °C4 February 1982	14.1 °C	790 mm	30	28
1981	37.4 °C4 August 1981	-7.2 °C17 January 1981	13.2 °C	983 mm	16	62
1980	34.0 °C2 August 1980	-7.0 °C5 December 1980	12.7 °C	1,084 mm	11	38
1979	33.0 °C5 August 1979	-7.4 °C3 January 1979	13.3 °C	1,446 mm	10	32
1978	32.9 °C7 August 1978	-4.0 °C9 January 1978	13.0 °C	1,171 mm	12	36
1977	32.3 °C30 July 1977	-4.5 °C21 December 1977	13.7 °C	991 mm	6	25
1976	30.5 °C16 July 1976	-4.1 °C29 January 1976	13.1 °C	1,167 mm	2	19
1975	34.3 °C18 July 1975	-4.6 °C10 January 1975	13.5 °C	982 mm	17	23
1974	35.4 °C16 August 1974	-3.6 °C9 February 1974	13.2 °C	999 mm	20	21
1973	32.4 °C13 August 1973	-6.9 °C1 December 1973	13.6 °C	713 mm	31	43
1972	32.3 °C12 August 1972	-3.3 °C1 February 1972	13.1 °C	1,323 mm	6	16
1971	36.1 °C8 August 1971	-5.5 °C8 March 1971	13.2 °C	1,034 mm	35	32
1970	34.7 °C23 July 1970	-8.6 °C24 December 1970	13.6 °C	864 mm	30	35
1969	33.0 °C21 July 1969	-6.2 °C18 February 1969	13.3 °C	1,198 mm	12	32
1968	36.6 °C10 July 1968	-11.7 °C14 January 1968	13.3 °C	1,095 mm	9	39
1967	35.1 °C25 July 1967	-12.5 °C10 January 1967	13.8 °C	749 mm	33	36
1966	33.9 °C12 August 1966	-5.6 °C9 January 1966	13.5 °C	1,193 mm	12	36
1965	35.7 °C25 July 1965	-9.1 °C13 February 1965	13.3 °C	1,276 mm	27	42
1964	33.4 °C18 July 1964	-4.3 °C9 February 1964	13.6 °C	1,056 mm	19	46
1963	32.6 °C4 August 1963	-6.4 °C22 January 1963	13.4 °C	1,185 mm	18	42
1962	36.8 °C28 July 1962	-3.6 °C28 December 1962	13.9 °C	961 mm	54	39
1961	36.4 °C12 August 1961	-3.9 °C17 December 1961	14.7 °C	836 mm	42	23
1960	37.6 °C28 August 1960	-3.9 °C19 January 1960	14.3 °C	1,318 mm	17	10
1959	34.1 °C28 July 1959	-2.3 °C6 January 1959	14.1 °C	1,042 mm	28	23
1958	35.8 °C3 August 1958	-6.9 °C13 March 1958	14.0 °C	1,050 mm	26	30
1957	37.3 °C13 August 1957	-7.7 °C21 January 1957	13.9 °C	807 mm	27	33
1956	39.3 °C8 August 1956	-13.1 °C16 February 1956	13.0 °C	787 mm	34	52
1955	33.9 °C20 July 1955	-3.9 °C15 February 1955	14.6 °C	832 mm	15	11
1954	33.2 °C21 August 1954	-5.6 °C25 January 1954	13.7 °C	729 mm	18	30
1953	35.3 °C18 July 1953	-3.8 °C8 February 1953	13.9 °C	855 mm	25	31
1952	36.9 °C6 July 1952	-4.8 °C17 December 1952	14.4 °C	985 mm	47	37
1951	33.3 °C3 August 1951	-2.0 °C18 January 1951	13.8 °C	1,026 mm	31	22
1950	37.3 °C5 July 1950	-8.5 °C21 December 1950	14.1 °C	901 mm	55	29
1949	34.7 °C10 August 1949	-4.2 °C4 February 1949	13.7 °C	675 mm	39	40
1948	32.9 °C10 August 1948	-5.9 °C24 February 1948	13.0 °C	897 mm	12	53
1947	37.7 °C3 August 1947	-5.1 °C8 January 1947	14.2 °C	983 mm	44	45
1946	36.1 °C19 August 1946	-3.0 °C2 February 1946	14.1 °C	876 mm	47	46
1945	37.9 °C30 July 1945	-18.1 °C23 January 1945	13.9 °C	548 mm	55	55
1944	35.5 °C24 August 1944	-5.7 °C12 February 1944	13.1 °C	954 mm	27	58
1943	35.4 °C20 August 1943	-4.8 °C11 January 1943	14.2 °C	866 mm	49	35
1942	32.9 °C30 August 1942	-11.4 °C24 January 1942	13.2 °C	655 mm	35	52
1941	35.0 °C26 July 1941	-8.9 °C19 January 1941	12.6 °C	868 mm	38	55
1940	34.0 °C10 August 1940	-13.0 °C20 January 1940	12.1 °C	888 mm	21	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

21.4 °C

+2.3 °C

Hot days (≥ 30 °C)

62 d/yr

+27

Frost days (< 0 °C)

1 d/yr

-31

Annual rainfall

880 mm

-64 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	12.6 °C	+2.8 °C	52 mm	-26 mm
Feb	13.6 °C	+2.4 °C	74 mm	-12 mm
Mar	16.1 °C	+2.1 °C	130 mm	+45 mm
Apr	19.7 °C	+2.5 °C	102 mm	+12 mm
May	22.7 °C	+1.1 °C	97 mm	+21 mm
Jun	31.8 °C	+5.8 °C	12 mm	-35 mm
Jul	31.5 °C	+2.0 °C	20 mm	-7 mm
Aug	31.3 °C	+1.8 °C	66 mm	+28 mm
Sep	26.8 °C	+1.6 °C	114 mm	+36 mm
Oct	21.1 °C	+0.9 °C	81 mm	-29 mm
Nov	16.3 °C	+1.7 °C	86 mm	-41 mm
Dec	13.3 °C	+2.4 °C	46 mm	-56 mm

The year's extremes

Hottest day

38.1 °C

11 Aug 2025

Coldest day

-1.0 °C

15 Jan 2025

Wettest day

69.7 mm

10 Sep 2025

Windiest day

24.0 km/h

17 Apr 2025

Strongest gust

70.6 km/h

17 Apr 2025

Hottest feels-like

39.5 °C

11 Aug 2025

Coldest feels-like

-4.5 °C

15 Jan 2025

Sunniest day

14.3 h

9 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 Marco Simone?

Marco Simone has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.0 °C and it receives 944 mm of precipitation per year.

What is the hottest day ever recorded in Marco Simone?

The hottest day measured in Marco Simone between 1940 and 2025 was 2 August 2017, reaching 39.4 °C.

What is the coldest day in Marco Simone?

The coldest day measured in Marco Simone between 1940 and 2025 was 23 January 1945, at -18.1 °C.

Does it snow in Marco Simone?

Yes. Marco Simone gets on average 8.9 cm of snow per year and has around 32 frost days.

Has the climate of Marco Simone warmed?

Yes: Marco Simone warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Marco Simone?

The wettest day measured in Marco Simone between 1940 and 2025 was 3 September 1959, with 88 mm of rain in 24 hours.

What was the windiest day in Marco Simone?

The windiest day measured in Marco Simone between 1940 and 2025 was 29 October 2018, with winds reaching 38.7 km/h.

What is the warmest month in Marco Simone?

The warmest month in Marco Simone is July (23.6 °C on average); the coldest is January (5.3 °C).

How much does it rain in Marco Simone?

Marco Simone receives on average 944 mm of precipitation per year, spread over about 116 rainy days.

Is it sunny in Marco Simone?

Marco Simone gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

What is the biggest single-day snowfall in Marco Simone?

The heaviest 24-hour snowfall measured in Marco Simone between 1940 and 2025 was 11 March 1956, with 25.0 cm.

Are there tropical nights in Marco Simone?

Yes: Marco Simone has on average 11 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Marco Simone?

In Marco Simone, between 1940 and 2025, the highest apparent temperature reached 41.3 °C on 3 August 2017, and the lowest was -23.1 °C on 23 January 1945.

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