Cayo Arcas Threshold Days by Year (MXN00004005)

10 fixed thresholds counted per year at Cayo Arcas (MXN00004005): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cayo Arcas Thresholds

Cayo Arcas: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1936 with 30.
Cayo Arcas: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 1936 with 11.
Cayo Arcas: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 1977 with 335.
Cayo Arcas: days with a maximum temperature at or above 90 F (32.2 C) in 27 years, most in 1979 with 192.
10 fixed thresholds have at least one qualifying day at Cayo Arcas.

Days at or above 30 C (86 F)

27 years with a qualifying day

Days per year at Cayo Arcas with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 335 in 1977.

Days at or above 30 C (86 F) per year at Cayo Arcas
Year	Days	Decade average
1930	179	196.9
1931	151	196.9
1932	152	196.9
1933	170	196.9
1934	160	196.9
1935	248	196.9
1936	265	196.9
1937	219	196.9
1938	196	196.9
1939	229	196.9
1940	222	218.2
1941	249	218.2
1942	235	218.2
1943	166	218.2
1944	219	218.2
1967	119	119
1974	221	268.2
1975	267	268.2
1976	221	268.2
1977	335	268.2
1978	276	268.2
1979	289	268.2
1982	281	257.4
1983	216	257.4
1984	236	257.4
1985	273	257.4
1986	281	257.4

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

First to last qualifying date each year at Cayo Arcas
Year	First date	Last date
1930	1930-03-20	1930-10-30
1931	1931-04-22	1931-12-02
1932	1932-03-05	1932-11-27
1933	1933-04-21	1933-11-23
1934	1934-03-10	1934-12-14
1935	1935-01-03	1935-12-30
1936	1936-01-03	1936-12-31
1937	1937-01-01	1937-11-10
1938	1938-02-01	1938-11-19
1939	1939-02-03	1939-11-21
1940	1940-01-07	1940-12-19
1941	1941-01-03	1941-12-28
1942	1942-01-01	1942-12-28
1943	1943-01-08	1943-12-28
1944	1944-01-08	1944-11-30
1967	1967-01-14	1967-10-21
1974	1974-04-06	1974-12-23
1975	1975-01-02	1975-12-03
1976	1976-01-13	1976-12-22
1977	1977-01-01	1977-12-31
1978	1978-01-14	1978-12-28
1979	1979-03-01	1979-12-29
1982	1982-01-01	1982-11-30
1983	1983-01-31	1983-12-22
1984	1984-01-06	1984-12-31
1985	1985-01-01	1985-12-29
1986	1986-01-14	1986-12-26

Every Fixed Threshold

Fixed thresholds at Cayo Arcas
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	27	335	1977	281
35 C (95 F): Days	18	72	1979	28
90 F (32.2 C): Days	27	192	1979	180
100 F (37.8 C): Days	8	3	1984	3
20 C (68 F): Tropical nights (min	27	364	1938	356
25 C (77 F): Days with min	27	273	1975	204
10 mm (0.39 in): Days with 10 mm or more rain	39	30	1936	6
25 mm (0.98 in): Days with 25 mm or more rain	29	11	1936	2
50 mm (1.97 in): Days with 50 mm or more rain	21	5	1931	1
100 mm (3.94 in): Days with 100 mm or more rain	6	2	1936	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1930.

Download the Data

Data for Cayo Arcas 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).

Cayo Arcas Threshold Days by Year (MXN00004005)

Key Facts for Cayo Arcas Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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