Chios Threshold Days by Year (GRE00105240)

8 fixed thresholds counted per year at Chios (GRE00105240): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chios Thresholds

Chios: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 2001 with 79.
Chios: nights with a minimum temperature at or above 20 C (68 F) in 31 years, most in 2003 with 93.
Chios: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 2001 with 32.
Chios: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 1983 with 15.
8 fixed thresholds have at least one qualifying day at Chios.

Days at or above 30 C (86 F)

31 years with a qualifying day

Days per year at Chios with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 2001.

Days at or above 30 C (86 F) per year at Chios
Year	Days	Decade average
1974	37	33.2
1975	32	33.2
1976	12	33.2
1977	46	33.2
1978	31	33.2
1979	41	33.2
1980	34	37.8
1981	24	37.8
1982	33	37.8
1983	22	37.8
1984	22	37.8
1985	41	37.8
1986	57	37.8
1987	45	37.8
1988	56	37.8
1989	44	37.8
1990	47	45
1991	35	45
1992	31	45
1993	42	45
1994	69	45
1995	35	45
1996	38	45
1997	39	45
1998	58	45
1999	56	45
2000	68	63
2001	79	63
2002	61	63
2003	61	63
2004	46	63

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

First to last qualifying date each year at Chios
Year	First date	Last date
1974	1974-06-07	1974-08-24
1975	1975-06-01	1975-09-03
1976	1976-06-23	1976-08-13
1977	1977-06-15	1977-08-30
1978	1978-06-13	1978-08-29
1979	1979-06-12	1979-09-29
1980	1980-06-10	1980-08-23
1981	1981-05-15	1981-08-25
1982	1982-06-20	1982-09-12
1983	1983-07-06	1983-08-28
1984	1984-06-07	1984-10-07
1985	1985-06-08	1985-09-03
1986	1986-06-03	1986-09-19
1987	1987-06-09	1987-09-29
1988	1988-06-17	1988-09-17
1989	1989-05-20	1989-09-11
1990	1990-05-26	1990-09-27
1991	1991-06-19	1991-10-02
1992	1992-06-23	1992-10-07
1993	1993-06-04	1993-09-12
1994	1994-05-23	1994-09-30
1995	1995-06-12	1995-09-18
1996	1996-06-09	1996-08-28
1997	1997-05-22	1997-08-30
1998	1998-06-10	1998-09-05
1999	1999-06-10	1999-08-27
2000	2000-06-06	2000-09-23
2001	2001-05-23	2001-09-26
2002	2002-06-08	2002-08-27
2003	2003-05-05	2003-09-01
2004	2004-06-18	2004-09-04

Every Fixed Threshold

Fixed thresholds at Chios
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	31	79	2001	46
35 C (95 F): Days	25	10	1987	2
40 C (104 F): Days	1	1	1994	1
90 F (32.2 C): Days	30	32	2001	8
100 F (37.8 C): Days	4	4	1987	1
0 C (32 F): Frost days (min	30	15	1983	12
20 C (68 F): Tropical nights (min	31	93	2003	84
25 C (77 F): Days with min	26	24	2001	8

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1974.

Download the Data

Data for Chios 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).

Chios Threshold Days by Year (GRE00105240)

Key Facts for Chios Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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