Decima climate — normals and trends

Q: What is the climate of Decima?

Decima has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.2 °C and it receives 774 mm of precipitation per year.

Q: What is the hottest day ever recorded in Decima?

The hottest day measured in Decima between 1940 and 2025 was 27 June 2019, reaching 40.7 °C.

Q: What is the coldest day in Decima?

The coldest day measured in Decima between 1940 and 2025 was 15 February 1940, at -23.3 °C.

Q: Does it snow in Decima?

Yes. Decima gets on average 20.4 cm of snow per year and has around 39 frost days.

Q: Has the climate of Decima warmed?

Yes: Decima warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Decima?

The wettest day measured in Decima between 1940 and 2025 was 30 July 2014, with 94 mm of rain in 24 hours.

Q: What was the windiest day in Decima?

The windiest day measured in Decima between 1940 and 2025 was 17 April 1991, with winds reaching 43.9 km/h.

Q: What is the warmest month in Decima?

The warmest month in Decima is July (25.3 °C on average); the coldest is January (3.1 °C).

Q: How much does it rain in Decima?

Decima receives on average 774 mm of precipitation per year, spread over about 106 rainy days.

Q: Is it sunny in Decima?

Decima gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

Decima (Italy) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.2 °C and it receives 774 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 (25.3 °C on average) and the coldest is January (3.1 °C). Rainfall peaks in May.

Decima averages 39 frost days, 51 hot days (≥ 30 °C) and 106 rainy days per year.

Decima has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.

The number of frost days there went from about 54 to 24 per year over the period.

The hottest day of the period reached 40.7 °C (on 27 June 2019) and the coldest -23.3 °C (on 15 February 1940).

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

DecimaEmilia-Romagna

coords: 44.71°, 11.23°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthJanuary

Mean daily temperature

14.2°C

Average daily high

18.9°C

Average daily low

10.0°C

Annual rainfall

774mm

Sunshine / day

9.4h

Mean relative humidity

73%

Average peak wind

11.8km/h

Seasonal range

22.2°C

Frost days (< 0 °C)

39 d/yr

Hot days (≥ 30 °C)

51 d/yr

Rainy days (≥ 1 mm)

106 d/yr

Annual snowfall

20.4 cm

Average feels-like high

18.2 °C

Average feels-like low

8.8 °C

Average peak gust

25.0 km/h

Tropical nights (≥ 20 °C)

39 d/yr

Solar radiation

14.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.5 °C

since 1940

+0.3 °C per decade · r² = 0.61 · 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

40.7 °C

27 June 2019

Coldest day

-23.3 °C

15 February 1940

Wettest day

94 mm

30 July 2014

Windiest day

43.9 km/h

17 April 1991

Strongest gust

86.8 km/h

17 April 1991

Hottest feels-like

44.0 °C

27 June 2019

Coldest feels-like

-28.4 °C

15 February 1940

Snowiest day

22.5 cm

21 February 1948

Sunniest day

15.0 h

23 June 1942

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.2 °C10 August 2025	-3.8 °C13 January 2025	15.2 °C	801 mm	67	19
2024	37.0 °C13 August 2024	-3.6 °C22 January 2024	15.2 °C	1,131 mm	70	27
2023	38.9 °C25 August 2023	-4.8 °C10 February 2023	15.9 °C	871 mm	66	20
2022	39.3 °C22 July 2022	-2.7 °C24 January 2022	16.2 °C	676 mm	94	27
2021	38.8 °C15 August 2021	-3.7 °C15 February 2021	15.2 °C	563 mm	78	26
2020	37.9 °C1 August 2020	-2.7 °C7 January 2020	15.6 °C	677 mm	63	18
2019	40.7 °C27 June 2019	-4.9 °C4 January 2019	15.7 °C	1,067 mm	73	26
2018	36.2 °C31 July 2018	-7.0 °C28 February 2018	15.6 °C	838 mm	70	27
2017	40.3 °C4 August 2017	-5.2 °C7 January 2017	15.6 °C	667 mm	82	40
2016	38.4 °C11 July 2016	-5.0 °C19 January 2016	15.2 °C	804 mm	72	32
2015	39.2 °C22 July 2015	-3.0 °C31 January 2015	15.6 °C	662 mm	68	21
2014	35.2 °C12 June 2014	-2.2 °C30 December 2014	15.8 °C	989 mm	27	5
2013	39.0 °C28 July 2013	-3.1 °C18 December 2013	14.7 °C	1,006 mm	63	32
2012	39.1 °C1 July 2012	-11.1 °C6 February 2012	15.4 °C	717 mm	77	56
2011	38.1 °C22 August 2011	-4.2 °C25 January 2011	15.2 °C	591 mm	66	43
2010	36.2 °C16 July 2010	-6.6 °C1 February 2010	14.0 °C	1,068 mm	46	43
2009	38.1 °C23 July 2009	-14.1 °C21 December 2009	15.4 °C	833 mm	73	33
2008	36.4 °C12 July 2008	-4.6 °C18 February 2008	15.6 °C	819 mm	77	19
2007	39.1 °C19 July 2007	-4.1 °C30 December 2007	15.6 °C	580 mm	66	13
2006	37.7 °C22 July 2006	-5.9 °C25 January 2006	15.0 °C	530 mm	64	40
2005	38.5 °C29 July 2005	-7.3 °C2 March 2005	14.1 °C	874 mm	53	68
2004	37.1 °C23 July 2004	-3.8 °C23 December 2004	14.7 °C	868 mm	67	30
2003	38.8 °C5 August 2003	-7.3 °C13 January 2003	15.4 °C	584 mm	90	45
2002	39.0 °C23 June 2002	-6.1 °C5 January 2002	15.1 °C	1,070 mm	44	27
2001	35.8 °C2 August 2001	-5.4 °C19 December 2001	14.7 °C	681 mm	62	32
2000	37.1 °C19 August 2000	-6.5 °C26 January 2000	15.4 °C	673 mm	59	24
1999	37.1 °C5 July 1999	-4.3 °C13 February 1999	15.1 °C	785 mm	62	45
1998	38.7 °C11 August 1998	-5.0 °C26 December 1998	15.3 °C	528 mm	77	31
1997	36.1 °C15 August 1997	-2.0 °C2 January 1997	15.4 °C	600 mm	66	10
1996	36.0 °C11 June 1996	-7.3 °C30 December 1996	14.2 °C	899 mm	44	27
1995	38.3 °C27 July 1995	-3.6 °C15 January 1995	14.3 °C	731 mm	48	24
1994	37.0 °C4 July 1994	-3.2 °C18 February 1994	15.4 °C	690 mm	66	22
1993	37.2 °C5 August 1993	-4.6 °C26 February 1993	14.5 °C	599 mm	56	41
1992	37.3 °C1 August 1992	-4.2 °C30 December 1992	14.7 °C	615 mm	60	35
1991	36.4 °C12 July 1991	-13.2 °C15 February 1991	13.6 °C	660 mm	59	55
1990	36.7 °C30 June 1990	-4.6 °C5 January 1990	14.6 °C	648 mm	52	46
1989	33.5 °C26 June 1989	-5.1 °C5 January 1989	13.7 °C	710 mm	34	52
1988	38.6 °C23 July 1988	-4.8 °C24 November 1988	14.5 °C	537 mm	49	35
1987	35.9 °C2 July 1987	-7.1 °C9 January 1987	13.9 °C	694 mm	64	48
1986	34.5 °C3 August 1986	-6.7 °C13 February 1986	13.6 °C	755 mm	48	43
1985	37.1 °C26 July 1985	-19.9 °C11 January 1985	13.7 °C	603 mm	52	44
1984	36.9 °C12 July 1984	-4.6 °C12 January 1984	13.1 °C	890 mm	30	38
1983	38.0 °C27 July 1983	-5.2 °C15 December 1983	14.1 °C	570 mm	47	48
1982	35.7 °C6 July 1982	-4.0 °C23 February 1982	14.4 °C	744 mm	53	36
1981	35.6 °C3 August 1981	-6.0 °C15 January 1981	13.5 °C	686 mm	33	60
1980	37.7 °C3 August 1980	-6.6 °C10 December 1980	13.0 °C	871 mm	29	46
1979	35.7 °C3 August 1979	-12.2 °C16 January 1979	13.6 °C	938 mm	42	33
1978	34.9 °C7 August 1978	-7.4 °C30 November 1978	13.0 °C	942 mm	23	41
1977	34.3 °C13 July 1977	-4.9 °C28 November 1977	13.9 °C	812 mm	27	24
1976	36.0 °C17 July 1976	-10.2 °C31 December 1976	13.6 °C	987 mm	38	34
1975	36.0 °C15 July 1975	-4.3 °C25 November 1975	14.2 °C	907 mm	42	32
1974	38.2 °C4 August 1974	-4.1 °C17 December 1974	14.1 °C	858 mm	43	13
1973	36.7 °C6 July 1973	-5.3 °C12 December 1973	14.0 °C	831 mm	60	42
1972	37.1 °C14 August 1972	-3.2 °C28 November 1972	13.7 °C	1,259 mm	31	16
1971	37.8 °C15 August 1971	-10.3 °C4 January 1971	14.1 °C	753 mm	60	50
1970	37.2 °C7 August 1970	-6.8 °C26 December 1970	14.0 °C	733 mm	59	34
1969	37.0 °C18 July 1969	-7.2 °C11 February 1969	13.8 °C	737 mm	42	51
1968	39.4 °C11 July 1968	-6.5 °C14 January 1968	13.9 °C	920 mm	28	36
1967	37.5 °C22 July 1967	-9.1 °C11 January 1967	14.1 °C	751 mm	42	46
1966	37.2 °C15 August 1966	-17.7 °C20 January 1966	13.9 °C	1,043 mm	36	48
1965	35.4 °C6 August 1965	-8.7 °C7 January 1965	13.1 °C	824 mm	36	49
1964	36.4 °C19 July 1964	-10.9 °C7 January 1964	13.6 °C	829 mm	47	53
1963	34.6 °C6 August 1963	-17.4 °C25 January 1963	12.8 °C	954 mm	41	73
1962	38.4 °C28 July 1962	-4.6 °C29 January 1962	13.8 °C	767 mm	62	53
1961	36.8 °C11 August 1961	-6.5 °C25 December 1961	14.9 °C	629 mm	59	35
1960	37.5 °C28 August 1960	-11.5 °C19 January 1960	14.0 °C	970 mm	21	30
1959	36.7 °C28 July 1959	-3.1 °C18 February 1959	14.5 °C	793 mm	42	28
1958	38.3 °C1 August 1958	-7.1 °C11 March 1958	14.3 °C	753 mm	42	40
1957	36.4 °C8 July 1957	-7.6 °C22 January 1957	13.7 °C	938 mm	28	38
1956	35.6 °C21 August 1956	-19.1 °C15 February 1956	12.9 °C	683 mm	40	54
1955	35.6 °C19 July 1955	-4.6 °C27 November 1955	13.7 °C	881 mm	17	19
1954	33.3 °C27 July 1954	-14.7 °C10 January 1954	13.1 °C	734 mm	25	62
1953	33.7 °C27 July 1953	-8.4 °C18 February 1953	13.8 °C	930 mm	30	47
1952	38.2 °C14 August 1952	-5.7 °C29 January 1952	14.2 °C	547 mm	63	54
1951	31.6 °C30 August 1951	-2.7 °C13 December 1951	13.8 °C	907 mm	23	27
1950	37.7 °C4 July 1950	-12.2 °C31 January 1950	14.8 °C	569 mm	73	31
1949	37.6 °C9 August 1949	-4.8 °C5 March 1949	14.0 °C	613 mm	38	52
1948	30.5 °C7 August 1948	-12.0 °C25 February 1948	12.7 °C	859 mm	5	50
1947	36.5 °C5 August 1947	-10.5 °C8 January 1947	13.4 °C	746 mm	49	70
1946	35.3 °C13 August 1946	-7.3 °C31 December 1946	13.4 °C	724 mm	39	59
1945	36.7 °C28 July 1945	-15.2 °C11 January 1945	13.6 °C	543 mm	45	65
1944	35.5 °C23 August 1944	-4.5 °C31 December 1944	13.1 °C	697 mm	28	57
1943	38.3 °C20 August 1943	-5.7 °C5 January 1943	14.4 °C	673 mm	59	41
1942	34.5 °C6 September 1942	-21.5 °C24 January 1942	12.6 °C	607 mm	40	68
1941	34.2 °C26 July 1941	-13.8 °C19 January 1941	12.2 °C	840 mm	26	66
1940	36.1 °C25 July 1940	-23.3 °C15 February 1940	11.9 °C	672 mm	28	96

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

20.0 °C

+1.1 °C

Hot days (≥ 30 °C)

67 d/yr

+16

Frost days (< 0 °C)

19 d/yr

-20

Annual rainfall

801 mm

+27 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	8.2 °C	+1.4 °C	34 mm	-16 mm
Feb	9.9 °C	+0.3 °C	82 mm	+28 mm
Mar	15.3 °C	+1.1 °C	106 mm	+46 mm
Apr	19.7 °C	+1.4 °C	70 mm	-4 mm
May	23.7 °C	+0.5 °C	85 mm	+6 mm
Jun	32.3 °C	+4.5 °C	19 mm	-46 mm
Jul	31.1 °C	+0.2 °C	63 mm	+5 mm
Aug	30.9 °C	+0.5 °C	73 mm	+12 mm
Sep	26.8 °C	+0.8 °C	71 mm	+6 mm
Oct	19.4 °C	-0.2 °C	74 mm	+2 mm
Nov	12.8 °C	+0.1 °C	60 mm	-17 mm
Dec	9.3 °C	+1.5 °C	65 mm	+6 mm

The year's extremes

Hottest day

37.2 °C

10 Aug 2025

Coldest day

-3.8 °C

13 Jan 2025

Wettest day

36.5 mm

28 Jul 2025

Windiest day

31.8 km/h

24 Dec 2025

Strongest gust

59.4 km/h

14 Feb 2025

Hottest feels-like

41.6 °C

4 Jul 2025

Coldest feels-like

-7.4 °C

13 Jan 2025

Sunniest day

15.0 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 Decima?

Decima has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.2 °C and it receives 774 mm of precipitation per year.

What is the hottest day ever recorded in Decima?

The hottest day measured in Decima between 1940 and 2025 was 27 June 2019, reaching 40.7 °C.

What is the coldest day in Decima?

The coldest day measured in Decima between 1940 and 2025 was 15 February 1940, at -23.3 °C.

Does it snow in Decima?

Yes. Decima gets on average 20.4 cm of snow per year and has around 39 frost days.

Has the climate of Decima warmed?

Yes: Decima warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Decima?

The wettest day measured in Decima between 1940 and 2025 was 30 July 2014, with 94 mm of rain in 24 hours.

What was the windiest day in Decima?

The windiest day measured in Decima between 1940 and 2025 was 17 April 1991, with winds reaching 43.9 km/h.

What is the warmest month in Decima?

The warmest month in Decima is July (25.3 °C on average); the coldest is January (3.1 °C).

How much does it rain in Decima?

Decima receives on average 774 mm of precipitation per year, spread over about 106 rainy days.

Is it sunny in Decima?

Decima gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

What is the biggest single-day snowfall in Decima?

The heaviest 24-hour snowfall measured in Decima between 1940 and 2025 was 21 February 1948, with 22.5 cm.

Are there tropical nights in Decima?

Yes: Decima has on average 39 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Decima?

In Decima, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 27 June 2019, and the lowest was -28.4 °C on 15 February 1940.

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