Megalopolis climate — normals and trends

Q: What is the climate of Megalopolis?

Megalopolis has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 13.3 °C and it receives 649 mm of precipitation per year.

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

The hottest day measured in Megalopolis between 1940 and 2025 was 24 August 1958, reaching 40.2 °C.

Q: What is the coldest day in Megalopolis?

The coldest day measured in Megalopolis between 1940 and 2025 was 2 January 1942, at -18.6 °C.

Q: Does it snow in Megalopolis?

Yes. Megalopolis gets on average 35.6 cm of snow per year and has around 38 frost days.

Q: Has the climate of Megalopolis warmed?

Yes: Megalopolis warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Megalopolis?

The wettest day measured in Megalopolis between 1940 and 2025 was 24 November 2005, with 90 mm of rain in 24 hours.

Q: What was the windiest day in Megalopolis?

The windiest day measured in Megalopolis between 1940 and 2025 was 14 February 1962, with winds reaching 35.6 km/h.

Q: What is the warmest month in Megalopolis?

The warmest month in Megalopolis is July (23.2 °C on average); the coldest is January (4.4 °C).

Q: How much does it rain in Megalopolis?

Megalopolis receives on average 649 mm of precipitation per year, spread over about 95 rainy days.

Q: Is it sunny in Megalopolis?

Megalopolis gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Megalopolis (Greece) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 13.3 °C and it receives 649 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 (23.2 °C on average) and the coldest is January (4.4 °C). Rainfall peaks in December.

Megalopolis averages 38 frost days, 40 hot days (≥ 30 °C) and 95 rainy days per year.

Megalopolis has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.2 °C (on 24 August 1958) and the coldest -18.6 °C (on 2 January 1942).

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

MegalopolisPeloponnese

coords: 37.40°, 22.14°
period: 1940–2025 · 86 yrs

CsaHot-summer MediterraneanWarmest monthJulyColdest monthJanuaryWettest monthDecemberDriest monthAugust

Mean daily temperature

13.3°C

Average daily high

18.9°C

Average daily low

8.3°C

Annual rainfall

649mm

Sunshine / day

10.1h

Mean relative humidity

70%

Average peak wind

11.6km/h

Seasonal range

18.8°C

Frost days (< 0 °C)

38 d/yr

Hot days (≥ 30 °C)

40 d/yr

Rainy days (≥ 1 mm)

95 d/yr

Annual snowfall

35.6 cm

Average feels-like high

17.7 °C

Average feels-like low

6.7 °C

Average peak gust

36.7 km/h

Tropical nights (≥ 20 °C)

4 d/yr

Solar radiation

16.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.27 · 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

40.2 °C

24 August 1958

Coldest day

-18.6 °C

2 January 1942

Wettest day

90 mm

24 November 2005

Windiest day

35.6 km/h

14 February 1962

Strongest gust

114.5 km/h

14 February 1962

Hottest feels-like

42.2 °C

7 July 1988

Coldest feels-like

-22.7 °C

2 January 1942

Snowiest day

29.0 cm

5 January 1946

Sunniest day

14.6 h

18 June 2012

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.2 °C22 July 2025	-2.9 °C20 March 2025	14.8 °C	580 mm	73	12
2024	36.4 °C12 June 2024	-3.6 °C23 January 2024	15.4 °C	489 mm	86	21
2023	38.8 °C23 July 2023	-6.6 °C1 February 2023	14.2 °C	651 mm	52	38
2022	35.5 °C20 August 2022	-11.2 °C26 January 2022	14.0 °C	470 mm	55	50
2021	40.0 °C3 August 2021	-7.2 °C16 February 2021	14.1 °C	724 mm	56	40
2020	37.0 °C17 May 2020	-6.4 °C10 January 2020	14.1 °C	487 mm	64	39
2019	34.3 °C9 August 2019	-6.5 °C9 January 2019	14.0 °C	691 mm	44	29
2018	33.4 °C22 July 2018	-4.1 °C5 January 2018	14.3 °C	697 mm	27	24
2017	38.3 °C1 July 2017	-9.6 °C11 January 2017	13.7 °C	512 mm	56	46
2016	34.8 °C18 June 2016	-8.2 °C1 January 2016	13.9 °C	593 mm	42	40
2015	35.2 °C30 July 2015	-8.5 °C6 January 2015	13.3 °C	643 mm	41	59
2014	35.9 °C22 August 2014	-4.5 °C28 December 2014	13.9 °C	642 mm	43	13
2013	34.7 °C30 July 2013	-5.7 °C6 December 2013	14.0 °C	720 mm	41	35
2012	38.2 °C16 July 2012	-8.5 °C29 February 2012	14.1 °C	618 mm	77	50
2011	35.7 °C20 July 2011	-6.3 °C8 March 2011	13.0 °C	629 mm	44	44
2010	35.5 °C16 August 2010	-4.7 °C12 December 2010	14.6 °C	601 mm	51	22
2009	37.8 °C25 July 2009	-5.2 °C1 January 2009	13.9 °C	773 mm	35	29
2008	35.4 °C15 July 2008	-9.9 °C18 February 2008	14.2 °C	420 mm	67	28
2007	38.7 °C25 July 2007	-5.6 °C6 February 2007	14.1 °C	518 mm	56	33
2006	36.9 °C21 August 2006	-11.9 °C8 February 2006	13.2 °C	551 mm	37	50
2005	35.8 °C3 August 2005	-5.6 °C4 February 2005	13.1 °C	764 mm	35	51
2004	34.9 °C10 July 2004	-9.2 °C13 February 2004	13.4 °C	485 mm	30	40
2003	36.9 °C31 August 2003	-9.7 °C24 March 2003	13.7 °C	921 mm	56	46
2002	35.7 °C11 August 2002	-16.6 °C6 January 2002	13.3 °C	638 mm	32	30
2001	35.1 °C20 July 2001	-14.3 °C20 December 2001	13.7 °C	614 mm	43	36
2000	37.1 °C6 July 2000	-10.2 °C24 December 2000	13.2 °C	531 mm	40	53
1999	36.7 °C21 August 1999	-6.6 °C3 February 1999	14.0 °C	682 mm	45	40
1998	38.0 °C3 July 1998	-5.1 °C19 March 1998	13.8 °C	591 mm	54	46
1997	35.3 °C19 June 1997	-5.0 °C4 February 1997	12.8 °C	537 mm	29	40
1996	36.0 °C8 July 1996	-12.9 °C7 March 1996	12.8 °C	673 mm	30	28
1995	33.4 °C26 June 1995	-5.2 °C23 November 1995	13.0 °C	563 mm	18	31
1994	38.1 °C12 August 1994	-4.8 °C19 December 1994	14.1 °C	579 mm	49	32
1993	37.2 °C27 August 1993	-5.7 °C27 February 1993	13.3 °C	543 mm	41	65
1992	34.6 °C9 July 1992	-6.1 °C3 February 1992	12.7 °C	422 mm	25	61
1991	33.3 °C1 October 1991	-10.9 °C3 February 1991	12.4 °C	617 mm	20	54
1990	33.6 °C3 July 1990	-6.3 °C10 January 1990	13.6 °C	459 mm	43	39
1989	32.4 °C14 July 1989	-5.2 °C5 January 1989	12.9 °C	383 mm	21	58
1988	40.0 °C7 July 1988	-4.4 °C4 March 1988	13.5 °C	658 mm	51	35
1987	38.1 °C22 July 1987	-16.5 °C8 March 1987	13.1 °C	651 mm	40	43
1986	34.4 °C25 July 1986	-11.1 °C29 December 1986	13.0 °C	788 mm	25	40
1985	36.5 °C31 July 1985	-12.2 °C26 February 1985	13.5 °C	652 mm	28	28
1984	34.7 °C16 July 1984	-5.0 °C9 December 1984	13.1 °C	521 mm	22	25
1983	35.1 °C25 July 1983	-14.2 °C6 February 1983	12.8 °C	413 mm	20	47
1982	37.3 °C27 June 1982	-5.6 °C27 March 1982	13.0 °C	677 mm	37	44
1981	35.7 °C27 June 1981	-13.3 °C29 January 1981	13.3 °C	802 mm	22	36
1980	37.6 °C11 July 1980	-8.9 °C1 March 1980	12.7 °C	765 mm	31	45
1979	34.0 °C14 July 1979	-5.4 °C4 January 1979	13.0 °C	800 mm	17	32
1978	35.5 °C7 July 1978	-7.2 °C10 January 1978	12.8 °C	729 mm	33	29
1977	36.7 °C10 July 1977	-5.3 °C8 January 1977	13.6 °C	475 mm	44	33
1976	30.9 °C11 August 1976	-10.6 °C21 January 1976	12.4 °C	785 mm	5	43
1975	32.5 °C20 July 1975	-6.3 °C1 March 1975	12.8 °C	600 mm	28	49
1974	35.0 °C18 July 1974	-3.5 °C1 February 1974	12.9 °C	719 mm	33	36
1973	39.0 °C19 July 1973	-8.8 °C1 March 1973	13.2 °C	811 mm	27	28
1972	35.8 °C16 June 1972	-8.2 °C7 February 1972	12.8 °C	763 mm	27	29
1971	35.1 °C17 June 1971	-5.3 °C8 February 1971	12.6 °C	916 mm	22	25
1970	36.1 °C9 August 1970	-3.8 °C6 December 1970	13.3 °C	699 mm	33	28
1969	35.5 °C16 August 1969	-3.0 °C24 January 1969	13.5 °C	680 mm	35	19
1968	36.3 °C12 August 1968	-7.8 °C14 January 1968	13.5 °C	821 mm	30	38
1967	35.4 °C11 August 1967	-9.7 °C17 February 1967	13.1 °C	643 mm	34	46
1966	35.7 °C6 August 1966	-14.7 °C9 January 1966	13.2 °C	828 mm	33	28
1965	37.8 °C27 July 1965	-10.4 °C9 February 1965	12.6 °C	777 mm	38	47
1964	35.0 °C23 August 1964	-8.3 °C10 February 1964	12.7 °C	686 mm	20	51
1963	37.3 °C16 August 1963	-14.2 °C26 January 1963	13.3 °C	752 mm	35	33
1962	36.0 °C12 July 1962	-4.6 °C8 February 1962	13.5 °C	786 mm	49	37
1961	35.5 °C14 August 1961	-5.9 °C23 December 1961	13.1 °C	497 mm	32	40
1960	36.0 °C6 August 1960	-4.8 °C3 February 1960	13.6 °C	735 mm	45	17
1959	33.5 °C12 August 1959	-8.4 °C31 January 1959	12.3 °C	613 mm	12	40
1958	40.2 °C24 August 1958	-4.3 °C10 January 1958	13.7 °C	586 mm	43	15
1957	37.4 °C15 August 1957	-7.4 °C3 March 1957	13.3 °C	614 mm	38	37
1956	38.5 °C23 July 1956	-12.9 °C9 February 1956	12.8 °C	721 mm	56	39
1955	34.4 °C22 July 1955	-3.5 °C17 March 1955	13.6 °C	774 mm	23	14
1954	35.3 °C29 July 1954	-12.0 °C27 January 1954	12.8 °C	768 mm	37	32
1953	35.2 °C20 July 1953	-7.0 °C18 December 1953	12.8 °C	718 mm	43	59
1952	38.8 °C22 August 1952	-4.9 °C10 March 1952	14.6 °C	712 mm	81	32
1951	39.1 °C10 August 1951	-4.6 °C14 December 1951	13.9 °C	671 mm	53	25
1950	35.6 °C2 August 1950	-9.2 °C14 January 1950	14.1 °C	538 mm	60	34
1949	35.7 °C9 July 1949	-14.0 °C8 February 1949	12.8 °C	567 mm	32	50
1948	35.4 °C11 August 1948	-9.9 °C3 December 1948	13.0 °C	492 mm	45	65
1947	36.5 °C25 August 1947	-10.6 °C23 January 1947	14.2 °C	653 mm	51	26
1946	36.2 °C22 July 1946	-8.2 °C9 January 1946	13.4 °C	799 mm	57	51
1945	39.3 °C10 August 1945	-16.5 °C24 February 1945	12.7 °C	699 mm	46	59
1944	35.3 °C23 July 1944	-9.8 °C29 December 1944	12.3 °C	651 mm	26	53
1943	38.1 °C22 July 1943	-12.5 °C29 January 1943	13.1 °C	546 mm	51	56
1942	35.9 °C13 July 1942	-18.6 °C2 January 1942	12.7 °C	662 mm	35	48
1941	36.7 °C5 August 1941	-13.4 °C7 December 1941	12.2 °C	692 mm	35	42
1940	35.2 °C16 July 1940	-8.1 °C15 January 1940	12.5 °C	911 mm	26	48

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

20.7 °C

+1.8 °C

Hot days (≥ 30 °C)

73 d/yr

+33

Frost days (< 0 °C)

12 d/yr

-26

Annual rainfall

580 mm

-69 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	12.3 °C	+3.6 °C	57 mm	-36 mm
Feb	9.2 °C	-0.7 °C	47 mm	-33 mm
Mar	16.4 °C	+3.9 °C	35 mm	-40 mm
Apr	17.1 °C	+0.4 °C	73 mm	+19 mm
May	22.7 °C	+0.9 °C	34 mm	-9 mm
Jun	29.9 °C	+3.2 °C	19 mm	-5 mm
Jul	33.2 °C	+3.5 °C	0 mm	-11 mm
Aug	30.7 °C	+0.9 °C	2 mm	-7 mm
Sep	27.7 °C	+1.9 °C	28 mm	+3 mm
Oct	18.6 °C	-1.4 °C	100 mm	+42 mm
Nov	16.5 °C	+1.9 °C	133 mm	+49 mm
Dec	12.6 °C	+2.4 °C	54 mm	-40 mm

The year's extremes

Hottest day

38.2 °C

22 Jul 2025

Coldest day

-2.9 °C

20 Mar 2025

Wettest day

41.0 mm

27 Nov 2025

Windiest day

22.5 km/h

8 Aug 2025

Strongest gust

67.0 km/h

3 Oct 2025

Hottest feels-like

39.9 °C

22 Jul 2025

Coldest feels-like

-6.5 °C

20 Mar 2025

Snowiest day

2.7 cm

14 Jan 2025

Sunniest day

14.6 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 Megalopolis?

Megalopolis has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 13.3 °C and it receives 649 mm of precipitation per year.

What is the hottest day ever recorded in Megalopolis?

The hottest day measured in Megalopolis between 1940 and 2025 was 24 August 1958, reaching 40.2 °C.

What is the coldest day in Megalopolis?

The coldest day measured in Megalopolis between 1940 and 2025 was 2 January 1942, at -18.6 °C.

Does it snow in Megalopolis?

Yes. Megalopolis gets on average 35.6 cm of snow per year and has around 38 frost days.

Has the climate of Megalopolis warmed?

Yes: Megalopolis warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Megalopolis?

The wettest day measured in Megalopolis between 1940 and 2025 was 24 November 2005, with 90 mm of rain in 24 hours.

What was the windiest day in Megalopolis?

The windiest day measured in Megalopolis between 1940 and 2025 was 14 February 1962, with winds reaching 35.6 km/h.

What is the warmest month in Megalopolis?

The warmest month in Megalopolis is July (23.2 °C on average); the coldest is January (4.4 °C).

How much does it rain in Megalopolis?

Megalopolis receives on average 649 mm of precipitation per year, spread over about 95 rainy days.

Is it sunny in Megalopolis?

Megalopolis gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

What is the biggest single-day snowfall in Megalopolis?

The heaviest 24-hour snowfall measured in Megalopolis between 1940 and 2025 was 5 January 1946, with 29.0 cm.

Are there tropical nights in Megalopolis?

Yes: Megalopolis has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Megalopolis?

In Megalopolis, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 7 July 1988, and the lowest was -22.7 °C on 2 January 1942.

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