Heraklion Threshold Days by Year (GR000016754)

12 fixed thresholds counted per year at Heraklion (GR000016754): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heraklion Thresholds

Heraklion: days with 10 mm (0.39 in) or more of precipitation in 69 years, most in 1962 with 27.
Heraklion: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1976 with 9.
Heraklion: nights with a minimum temperature at or above 20 C (68 F) in 51 years, most in 1999 with 110.
Heraklion: days with a maximum temperature at or above 30 C (86 F) in 47 years, most in 1966 with 53.
12 fixed thresholds have at least one qualifying day at Heraklion.

Days at or above 30 C (86 F)

47 years with a qualifying day

Days per year at Heraklion with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 1966.

Days at or above 30 C (86 F) per year at Heraklion
Year	Days	Decade average
1955	28	25.8
1956	23	25.8
1957	29	25.8
1958	28	25.8
1959	21	25.8
1960	44	37.2
1961	37	37.2
1962	39	37.2
1963	42	37.2
1964	29	37.2
1965	37	37.2
1966	53	37.2
1967	27	37.2
1968	40	37.2
1969	24	37.2
1970	15	16.5
1971	16	16.5
1972	24	16.5
1973	18	16.5
1974	19	16.5
1975	10	16.5
1976	4	16.5
1977	22	16.5
1978	19	16.5
1979	18	16.5
1980	17	20.4
1981	15	20.4
1982	13	20.4
1983	12	20.4
1984	25	20.4
1985	18	20.4
1986	15	20.4
1987	26	20.4
1988	41	20.4
1989	22	20.4
1990	27	28.9
1991	22	28.9
1992	20	28.9
1993	31	28.9
1994	30	28.9
1995	24	28.9
1996	30	28.9
1997	28	28.9
1998	38	28.9
1999	39	28.9
2000	22	22
2025	19	19

For each year, a bar from the first to the last day at Heraklion meeting 30 C (86 F).

First to last qualifying date each year at Heraklion
Year	First date	Last date
1955	1955-04-01	1955-11-02
1956	1956-04-23	1956-10-29
1957	1957-04-14	1957-10-05
1958	1958-05-17	1958-09-03
1959	1959-05-30	1959-08-29
1960	1960-05-20	1960-10-17
1961	1961-04-30	1961-11-14
1962	1962-05-15	1962-09-29
1963	1963-06-13	1963-10-09
1964	1964-05-29	1964-10-26
1965	1965-05-31	1965-11-23
1966	1966-05-11	1966-11-05
1967	1967-05-19	1967-10-06
1968	1968-05-11	1968-09-25
1969	1969-05-22	1969-09-16
1970	1970-04-12	1970-10-23
1971	1971-05-03	1971-10-05
1972	1972-04-24	1972-10-09
1973	1973-05-21	1973-09-28
1974	1974-04-29	1974-10-24
1975	1975-05-24	1975-08-28
1976	1976-06-06	1976-09-17
1977	1977-05-23	1977-10-09
1978	1978-05-01	1978-09-08
1979	1979-06-16	1979-10-30
1980	1980-05-28	1980-10-19
1981	1981-06-25	1981-10-28
1982	1982-06-22	1982-10-09
1983	1983-04-29	1983-09-18
1984	1984-05-11	1984-10-08
1985	1985-04-10	1985-08-27
1986	1986-06-06	1986-08-24
1987	1987-05-21	1987-08-29
1988	1988-05-07	1988-09-22
1989	1989-04-05	1989-10-10
1990	1990-04-26	1990-11-05
1991	1991-05-04	1991-10-20
1992	1992-06-04	1992-10-30
1993	1993-04-13	1993-10-23
1994	1994-04-17	1994-09-20
1995	1995-05-12	1995-09-07
1996	1996-05-11	1996-09-24
1997	1997-05-07	1997-10-15
1998	1998-04-09	1998-10-13
1999	1999-04-17	1999-10-20
2000	2000-06-24	2000-09-22
2025	2025-05-07	2025-08-17

Every Fixed Threshold

Fixed thresholds at Heraklion
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	47	53	1966	19
35 C (95 F): Days	46	8	1988	3
40 C (104 F): Days	4	1	1963	1
90 F (32.2 C): Days	47	21	1988	4
100 F (37.8 C): Days	16	2	1963	1
0 C (32 F): Frost days (min	1	0	n/a	3
20 C (68 F): Tropical nights (min	51	110	1999	40
25 C (77 F): Days with min	46	22	1988	6
10 mm (0.39 in): Days with 10 mm or more rain	69	27	1962	6
25 mm (0.98 in): Days with 25 mm or more rain	67	9	1976	1
50 mm (1.97 in): Days with 50 mm or more rain	27	3	1976	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1963	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

Data for Heraklion threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Heraklion Threshold Days by Year (GR000016754)

Key Facts for Heraklion Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related