Castel San Giovanni climate — normals and trends

Q: What is the climate of Castel San Giovanni?

Castel San Giovanni has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.4 °C and it receives 946 mm of precipitation per year.

Q: What is the hottest day ever recorded in Castel San Giovanni?

The hottest day measured in Castel San Giovanni between 1940 and 2025 was 27 June 2019, reaching 38.6 °C.

Q: What is the coldest day in Castel San Giovanni?

The coldest day measured in Castel San Giovanni between 1940 and 2025 was 10 January 1985, at -19.8 °C.

Q: Does it snow in Castel San Giovanni?

Yes. Castel San Giovanni gets on average 52.5 cm of snow per year and has around 52 frost days.

Q: Has the climate of Castel San Giovanni warmed?

Yes: Castel San Giovanni warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Castel San Giovanni?

The wettest day measured in Castel San Giovanni between 1940 and 2025 was 18 August 1979, with 78 mm of rain in 24 hours.

Q: What was the windiest day in Castel San Giovanni?

The windiest day measured in Castel San Giovanni between 1940 and 2025 was 5 October 1944, with winds reaching 37.3 km/h.

Q: What is the warmest month in Castel San Giovanni?

The warmest month in Castel San Giovanni is July (23.0 °C on average); the coldest is January (1.7 °C).

Q: How much does it rain in Castel San Giovanni?

Castel San Giovanni receives on average 946 mm of precipitation per year, spread over about 117 rainy days.

Q: Is it sunny in Castel San Giovanni?

Castel San Giovanni gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

Castel San Giovanni (Italy) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.4 °C and it receives 946 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 (23.0 °C on average) and the coldest is January (1.7 °C). Rainfall peaks in November.

Castel San Giovanni averages 52 frost days, 20 hot days (≥ 30 °C) and 117 rainy days per year.

Castel San Giovanni has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.

The number of frost days there went from about 74 to 30 per year over the period.

The hottest day of the period reached 38.6 °C (on 27 June 2019) and the coldest -19.8 °C (on 10 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

Castel San GiovanniEmilia-Romagna

coords: 45.06°, 9.44°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthNovemberDriest monthJuly

Mean daily temperature

12.4°C

Average daily high

16.7°C

Average daily low

8.7°C

Annual rainfall

946mm

Sunshine / day

9.2h

Mean relative humidity

75%

Average peak wind

9.9km/h

Seasonal range

21.3°C

Frost days (< 0 °C)

52 d/yr

Hot days (≥ 30 °C)

20 d/yr

Rainy days (≥ 1 mm)

117 d/yr

Annual snowfall

52.5 cm

Average feels-like high

15.9 °C

Average feels-like low

7.3 °C

Average peak gust

25.4 km/h

Tropical nights (≥ 20 °C)

17 d/yr

Solar radiation

13.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.8 °C

since 1940

+0.3 °C per decade · r² = 0.70 · 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

38.6 °C

27 June 2019

Coldest day

-19.8 °C

10 January 1985

Wettest day

78 mm

18 August 1979

Windiest day

37.3 km/h

5 October 1944

Strongest gust

82.8 km/h

27 February 1990

Hottest feels-like

41.4 °C

27 June 2019

Coldest feels-like

-24.1 °C

10 January 1985

Snowiest day

36.8 cm

17 February 1967

Sunniest day

15.0 h

27 June 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.8 °C10 August 2025	-3.2 °C15 January 2025	14.0 °C	1,071 mm	41	17
2024	34.1 °C28 July 2024	-4.0 °C21 January 2024	14.0 °C	1,604 mm	48	18
2023	36.8 °C23 August 2023	-4.7 °C8 February 2023	14.7 °C	968 mm	35	22
2022	36.2 °C22 July 2022	-3.2 °C10 January 2022	14.8 °C	743 mm	52	27
2021	35.6 °C15 August 2021	-7.1 °C11 January 2021	13.4 °C	847 mm	32	33
2020	33.9 °C1 August 2020	-5.4 °C27 December 2020	13.8 °C	969 mm	23	31
2019	38.6 °C27 June 2019	-5.7 °C31 January 2019	14.1 °C	1,075 mm	43	44
2018	34.2 °C5 August 2018	-6.6 °C28 February 2018	13.9 °C	1,079 mm	29	31
2017	37.9 °C5 August 2017	-6.9 °C9 January 2017	14.0 °C	718 mm	64	47
2016	33.5 °C11 July 2016	-5.8 °C21 January 2016	13.5 °C	962 mm	24	24
2015	35.1 °C18 July 2015	-4.7 °C9 February 2015	14.0 °C	790 mm	41	30
2014	32.1 °C12 June 2014	-4.0 °C31 December 2014	14.0 °C	1,364 mm	9	11
2013	34.9 °C5 August 2013	-5.7 °C18 January 2013	12.9 °C	1,267 mm	23	51
2012	36.1 °C21 August 2012	-13.1 °C6 February 2012	13.7 °C	861 mm	58	48
2011	34.6 °C22 August 2011	-4.0 °C20 December 2011	13.6 °C	700 mm	17	36
2010	33.2 °C16 July 2010	-9.7 °C18 December 2010	12.2 °C	1,455 mm	17	63
2009	33.7 °C18 August 2009	-14.6 °C20 December 2009	13.5 °C	1,059 mm	41	51
2008	32.3 °C30 July 2008	-5.1 °C18 February 2008	13.5 °C	1,085 mm	25	26
2007	35.3 °C18 July 2007	-4.0 °C27 January 2007	13.7 °C	748 mm	29	27
2006	34.7 °C22 July 2006	-6.2 °C10 January 2006	13.3 °C	636 mm	37	54
2005	34.9 °C27 June 2005	-11.4 °C2 March 2005	12.6 °C	912 mm	29	77
2004	35.2 °C23 July 2004	-4.7 °C5 January 2004	13.1 °C	875 mm	20	44
2003	37.5 °C11 August 2003	-6.3 °C25 December 2003	14.0 °C	659 mm	68	45
2002	34.1 °C23 June 2002	-6.7 °C5 January 2002	13.5 °C	1,221 mm	17	23
2001	33.7 °C2 August 2001	-7.1 °C18 December 2001	13.3 °C	850 mm	36	41
2000	33.5 °C25 August 2000	-6.6 °C27 January 2000	13.8 °C	954 mm	21	32
1999	33.0 °C5 July 1999	-7.8 °C22 December 1999	13.3 °C	890 mm	19	52
1998	35.7 °C11 August 1998	-5.1 °C9 December 1998	13.4 °C	734 mm	45	50
1997	32.3 °C15 August 1997	-3.0 °C7 December 1997	13.5 °C	733 mm	12	32
1996	32.7 °C12 June 1996	-8.8 °C30 December 1996	12.2 °C	1,044 mm	14	56
1995	34.6 °C22 July 1995	-5.4 °C7 January 1995	12.6 °C	852 mm	24	41
1994	34.7 °C4 July 1994	-5.2 °C18 February 1994	13.6 °C	793 mm	35	27
1993	34.4 °C5 August 1993	-6.0 °C5 January 1993	12.8 °C	764 mm	21	48
1992	33.4 °C9 August 1992	-5.4 °C29 December 1992	12.8 °C	850 mm	28	37
1991	34.4 °C12 July 1991	-13.8 °C14 February 1991	12.0 °C	705 mm	36	64
1990	33.2 °C22 July 1990	-6.8 °C6 January 1990	12.8 °C	847 mm	14	54
1989	30.8 °C16 August 1989	-6.9 °C31 December 1989	12.3 °C	722 mm	8	58
1988	33.1 °C23 July 1988	-4.7 °C24 November 1988	12.7 °C	732 mm	26	48
1987	32.0 °C2 July 1987	-11.4 °C12 January 1987	12.2 °C	888 mm	17	55
1986	32.1 °C30 July 1986	-8.4 °C9 February 1986	11.9 °C	853 mm	13	64
1985	33.7 °C26 July 1985	-19.8 °C10 January 1985	12.0 °C	827 mm	20	64
1984	32.4 °C12 July 1984	-6.4 °C12 January 1984	11.4 °C	1,029 mm	15	53
1983	35.3 °C27 July 1983	-5.9 °C15 December 1983	12.3 °C	721 mm	18	68
1982	33.6 °C7 July 1982	-5.7 °C29 January 1982	12.5 °C	900 mm	16	56
1981	32.2 °C3 August 1981	-7.1 °C26 December 1981	12.1 °C	900 mm	8	72
1980	33.7 °C3 August 1980	-8.9 °C14 January 1980	11.5 °C	1,040 mm	11	56
1979	32.3 °C28 July 1979	-15.7 °C15 January 1979	11.7 °C	1,258 mm	7	49
1978	30.0 °C17 July 1978	-10.7 °C7 December 1978	11.3 °C	1,114 mm	2	63
1977	29.6 °C12 July 1977	-7.5 °C18 January 1977	12.0 °C	1,312 mm	0	37
1976	32.8 °C17 July 1976	-8.2 °C30 December 1976	11.9 °C	1,089 mm	16	46
1975	31.2 °C15 July 1975	-5.0 °C25 November 1975	12.3 °C	1,133 mm	7	32
1974	33.7 °C16 August 1974	-3.1 °C15 December 1974	12.5 °C	999 mm	15	17
1973	32.6 °C20 August 1973	-5.8 °C12 March 1973	12.2 °C	938 mm	14	55
1972	31.6 °C12 August 1972	-5.0 °C27 January 1972	11.7 °C	1,419 mm	3	32
1971	32.9 °C15 August 1971	-10.7 °C3 January 1971	12.1 °C	950 mm	25	62
1970	33.0 °C6 August 1970	-6.3 °C17 February 1970	12.0 °C	825 mm	16	65
1969	31.4 °C18 July 1969	-12.7 °C8 December 1969	11.4 °C	1,034 mm	13	76
1968	32.7 °C10 July 1968	-17.5 °C13 January 1968	11.7 °C	1,036 mm	9	65
1967	32.3 °C19 July 1967	-11.8 °C8 January 1967	12.1 °C	959 mm	16	55
1966	32.3 °C14 August 1966	-13.9 °C19 January 1966	11.9 °C	1,247 mm	8	76
1965	32.9 °C26 June 1965	-9.1 °C24 November 1965	11.2 °C	908 mm	14	78
1964	33.1 °C17 July 1964	-13.2 °C18 January 1964	11.9 °C	950 mm	10	67
1963	30.5 °C3 August 1963	-16.3 °C23 January 1963	10.8 °C	1,263 mm	2	84
1962	34.0 °C14 August 1962	-6.8 °C15 March 1962	11.7 °C	864 mm	31	74
1961	32.8 °C11 August 1961	-10.4 °C20 January 1961	13.1 °C	743 mm	22	51
1960	31.8 °C28 August 1960	-8.5 °C19 January 1960	12.0 °C	1,219 mm	6	46
1959	31.7 °C13 July 1959	-4.5 °C16 December 1959	12.4 °C	1,070 mm	11	47
1958	34.2 °C1 August 1958	-8.2 °C20 February 1958	12.2 °C	964 mm	19	59
1957	33.7 °C8 July 1957	-5.2 °C19 January 1957	12.0 °C	1,122 mm	10	54
1956	32.3 °C10 August 1956	-19.0 °C15 February 1956	11.1 °C	887 mm	3	69
1955	32.8 °C18 July 1955	-9.9 °C8 March 1955	12.0 °C	859 mm	6	40
1954	30.2 °C27 July 1954	-14.3 °C9 January 1954	11.3 °C	993 mm	1	67
1953	31.0 °C26 July 1953	-8.6 °C14 January 1953	12.0 °C	991 mm	1	60
1952	34.3 °C6 July 1952	-10.8 °C7 February 1952	11.9 °C	758 mm	21	83
1951	29.2 °C30 August 1951	-7.9 °C31 December 1951	11.9 °C	1,433 mm	0	49
1950	35.7 °C4 July 1950	-11.9 °C31 January 1950	12.9 °C	609 mm	35	44
1949	32.6 °C9 August 1949	-8.8 °C14 January 1949	12.2 °C	758 mm	9	64
1948	28.8 °C26 August 1948	-13.1 °C24 February 1948	11.3 °C	935 mm	0	60
1947	34.1 °C2 August 1947	-16.0 °C7 January 1947	11.4 °C	964 mm	15	83
1946	32.1 °C6 August 1946	-14.3 °C18 December 1946	11.2 °C	882 mm	6	80
1945	33.0 °C23 July 1945	-16.7 °C9 January 1945	11.7 °C	759 mm	15	82
1944	33.8 °C23 August 1944	-7.6 °C31 December 1944	11.4 °C	771 mm	15	85
1943	35.5 °C20 August 1943	-11.3 °C5 January 1943	12.2 °C	832 mm	27	65
1942	31.9 °C7 June 1942	-18.7 °C23 January 1942	11.3 °C	645 mm	9	80
1941	31.8 °C25 July 1941	-14.1 °C18 January 1941	10.5 °C	920 mm	6	88
1940	32.7 °C25 July 1940	-19.0 °C21 January 1940	10.3 °C	622 mm	4	101

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

18.4 °C

+1.7 °C

Hot days (≥ 30 °C)

41 d/yr

+21

Frost days (< 0 °C)

17 d/yr

-35

Annual rainfall

1071 mm

+125 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	6.7 °C	+1.6 °C	87 mm	+24 mm
Feb	8.3 °C	+0.5 °C	63 mm	+1 mm
Mar	13.7 °C	+1.3 °C	124 mm	+52 mm
Apr	18.4 °C	+2.0 °C	73 mm	-18 mm
May	22.3 °C	+1.4 °C	132 mm	+35 mm
Jun	30.6 °C	+5.5 °C	15 mm	-63 mm
Jul	29.2 °C	+1.3 °C	72 mm	+11 mm
Aug	29.3 °C	+1.9 °C	114 mm	+36 mm
Sep	23.9 °C	+0.7 °C	140 mm	+60 mm
Oct	17.7 °C	+0.7 °C	62 mm	-35 mm
Nov	11.3 °C	+0.8 °C	80 mm	-17 mm
Dec	8.5 °C	+2.3 °C	111 mm	+40 mm

The year's extremes

Hottest day

35.8 °C

10 Aug 2025

Coldest day

-3.2 °C

15 Jan 2025

Wettest day

36.7 mm

16 Dec 2025

Windiest day

30.4 km/h

17 Apr 2025

Strongest gust

68.8 km/h

17 Apr 2025

Hottest feels-like

39.4 °C

4 Jul 2025

Coldest feels-like

-7.0 °C

15 Jan 2025

Snowiest day

6.8 cm

21 Nov 2025

Sunniest day

15.0 h

9 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 Castel San Giovanni?

Castel San Giovanni has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.4 °C and it receives 946 mm of precipitation per year.

What is the hottest day ever recorded in Castel San Giovanni?

The hottest day measured in Castel San Giovanni between 1940 and 2025 was 27 June 2019, reaching 38.6 °C.

What is the coldest day in Castel San Giovanni?

The coldest day measured in Castel San Giovanni between 1940 and 2025 was 10 January 1985, at -19.8 °C.

Does it snow in Castel San Giovanni?

Yes. Castel San Giovanni gets on average 52.5 cm of snow per year and has around 52 frost days.

Has the climate of Castel San Giovanni warmed?

Yes: Castel San Giovanni warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Castel San Giovanni?

The wettest day measured in Castel San Giovanni between 1940 and 2025 was 18 August 1979, with 78 mm of rain in 24 hours.

What was the windiest day in Castel San Giovanni?

The windiest day measured in Castel San Giovanni between 1940 and 2025 was 5 October 1944, with winds reaching 37.3 km/h.

What is the warmest month in Castel San Giovanni?

The warmest month in Castel San Giovanni is July (23.0 °C on average); the coldest is January (1.7 °C).

How much does it rain in Castel San Giovanni?

Castel San Giovanni receives on average 946 mm of precipitation per year, spread over about 117 rainy days.

Is it sunny in Castel San Giovanni?

Castel San Giovanni gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

What is the biggest single-day snowfall in Castel San Giovanni?

The heaviest 24-hour snowfall measured in Castel San Giovanni between 1940 and 2025 was 17 February 1967, with 36.8 cm.

Are there tropical nights in Castel San Giovanni?

Yes: Castel San Giovanni has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Castel San Giovanni?

In Castel San Giovanni, between 1940 and 2025, the highest apparent temperature reached 41.4 °C on 27 June 2019, and the lowest was -24.1 °C on 10 January 1985.

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