Athalassa Threshold Days by Year (CYE00115565)

13 fixed thresholds counted per year at Athalassa (CYE00115565): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Athalassa Thresholds

Athalassa: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 1998 with 155.
Athalassa: days with a maximum temperature at or above 35 C (95 F) in 31 years, most in 1994 with 99.
Athalassa: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 1994 with 141.
Athalassa: days with a maximum temperature at or above 100 F (37.8 C) in 31 years, most in 2008 with 53.
13 fixed thresholds have at least one qualifying day at Athalassa.

Days at or above 30 C (86 F)

31 years with a qualifying day

Days per year at Athalassa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 155 in 1998.

Days at or above 30 C (86 F) per year at Athalassa
Year	Days	Decade average
1983	114	139
1984	153	139
1985	141	139
1986	132	139
1987	139	139
1988	140	139
1989	154	139
1990	145	147.9
1991	145	147.9
1992	147	147.9
1993	152	147.9
1994	154	147.9
1995	142	147.9
1996	145	147.9
1997	140	147.9
1998	155	147.9
1999	154	147.9
2000	134	144
2001	149	144
2002	134	144
2003	153	144
2004	151	144
2005	142	144
2006	140	144
2007	146	144
2008	146	144
2009	145	144
2010	155	146.5
2011	132	146.5
2012	150	146.5
2013	149	146.5

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

First to last qualifying date each year at Athalassa
Year	First date	Last date
1983	1983-04-29	1983-10-20
1984	1984-05-11	1984-10-15
1985	1985-04-17	1985-10-07
1986	1986-04-19	1986-10-30
1987	1987-05-07	1987-10-16
1988	1988-04-26	1988-10-08
1989	1989-04-05	1989-10-11
1990	1990-04-24	1990-11-06
1991	1991-03-29	1991-10-22
1992	1992-04-30	1992-11-05
1993	1993-04-15	1993-10-27
1994	1994-04-13	1994-10-12
1995	1995-05-12	1995-10-26
1996	1996-05-05	1996-10-19
1997	1997-04-23	1997-10-17
1998	1998-04-10	1998-10-24
1999	1999-04-18	1999-10-23
2000	2000-04-02	2000-10-06
2001	2001-04-21	2001-10-14
2002	2002-05-04	2002-10-19
2003	2003-05-02	2003-10-26
2004	2004-04-11	2004-10-28
2005	2005-04-11	2005-10-27
2006	2006-04-20	2006-10-11
2007	2007-05-03	2007-11-06
2008	2008-03-21	2008-10-21
2009	2009-04-22	2009-10-25
2010	2010-04-17	2010-11-15
2011	2011-05-17	2011-10-10
2012	2012-04-06	2012-11-05
2013	2013-04-27	2013-10-16

Every Fixed Threshold

Fixed thresholds at Athalassa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	31	155	1998	149
35 C (95 F): Days	31	99	1994	82
40 C (104 F): Days	30	16	1987	10
45 C (113 F): Days	1	1	2010	1
90 F (32.2 C): Days	31	141	1994	122
100 F (37.8 C): Days	31	53	2008	26
110 F (43.3 C): Days	5	2	2007	1
0 C (32 F): Frost days (min	9	3	1997	1
20 C (68 F): Tropical nights (min	31	102	2000	88
25 C (77 F): Days with min	29	31	2012	16
10 mm (0.39 in): Days with 10 mm or more rain	4	11	2011	8
25 mm (0.98 in): Days with 25 mm or more rain	3	3	2010	2
50 mm (1.97 in): Days with 50 mm or more rain	2	1	2010	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1983.

Download the Data

Data for Athalassa 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).

Athalassa Threshold Days by Year (CYE00115565)

Key Facts for Athalassa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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